My thoughts on religion and freewill and how they don't mix

hello wanted to share my ideas on freewill and see how it shapes up to others. (sorry for any spelling, grammar errors if they occur)
(quick disclaimer, I am relatively young (for anyone who wants to try understand my mind set), I despise religion)

Freewill is a idea strong to most peoples hearts whether they think they have freewill or not, freewill is rooted in various religions and is used in attempts to dispel some logical fallacies within some religions, (focusing mainly on the christian faith mostly because of its familiarity among western regions and what i mainly know), also freewill brings up many moral problems when one gets into the nitty gritty of it all. let me first discuss my view on freewill before i step into any tangents or my topics i brought up earlier.

Freewill is stated to be the "ability to act on ones own discretion", so lets say your sitting at a table in a room and someone places a cube of sugar right in front of you. the person says "don't eat it", now you got 2 choices to eat or not to eat it. lets say you eat it, now can you tell me if you eat it out of your freewill or as a reaction weather out of a rebellious response you eat it or otherwise. can you truly tell if you where not influenced by anything to make that decision or not. what i truly believe is freewill does not exist at all because you are not a closed system, you constantly receive stimulus from surroundings and information which can impact you to make decisions but another might argue your experiences assist in reacting to such stimulus therefore freewill as you make a choice. i would say ,but those experiences are also effected by other things outside of oneself, eventually this argument will boil down to what "you" is which i respond (sorry any scientist for either failing to explain or watering down science) ,you are a constantly changing thing always dynamic as new matter enter you and essentially embodies you until its used by something else in the body and refreshed with the same element/molecule also energy enters and exist you from light hitting your face or infrared existing your body this somehow might change you ,the you 10 years ago is not the you now from the atoms and molecules within you but the complex layout for "you" is roughly there from your DNA mainly intact relatively from 10 years ago (not the atoms but the order of its arrangement of bases), to the roughly correct electrical potentials placed in your brain which allow you to retain memory but most likely your brain has changed weather from its synapse for certain connects strengthening or weakening or even new ones formed or severed hence new memories and skills changing. the point of that was to "demystify" "you" as you are part of this universe and as such you are subjected to the laws of this universe from gravity to thermodynamics, so what i am trying to get across is you are mildly to a degree predictable as we start to understand more about biology, evolution, and science as a whole as we can predict what will happen if certain things are changed in you (side note: you are your body i hate it when someone says "so my brain" in essence you are your brain as much as its you, you=you) but at the current moment our computers and knowledge is not up for the task of calculating all the current variables not even to mention all the unaccounted unknown variables to predict what you will do. long story short you are predictably when broken down to simply components of chemical reactions addded together to net you something that thinks but sometimes something that can not think enough to think that it thinking is subjected to this universe. use i do know that there is a thing called quantum physics that show randomness which can be a source of "freewill" within people but the heck we know.

Now onto the religion thing,

I once told a religious friend: is your "god" all caring and loving, knowing and all powerful
he says: yea why?
then i said: why do people suffer if god is caring and loving?
he answers: because we sin
i say: why do we sin? if god was our curator who built us so we would break down in away that deserves punishment he is again also all knowing? right
he says: because the devil
i respond: i thought god was also all powerful so why not kill the devil
he says: because god gave us freewill
i say: well thats kind of evil for him to set us up like that as he would know the result of letting us giving in to the devils words even ignoring the fact you just ignored the part of him being able to kill the devil.

As you can see here religion uses freewill as a last resort of sorts to side step the argument most the time as mainly religious people when backed into a corner resort to broad subjects as freewill thinking the other won't step into the "unholy" thing of saying no one controls anything in away. science is a good way to analyse things but just as religion it can be corrupted by humans but we still have back and thought dialects and no oppressing absolute rule over us.some examples of sciences non dictatorship like rule on people, punctuated evolution or gradualism another is panspermia or life emerged on earth which all use evidence gathered to come up with these models of reality while religion gets it "truths" from a book thats been "somehow" copied and translatored countless times through years with no error at all. i see bullshit.

last conjecture before i end this. going with the the idea that freewill does not exist is a person truly accountable for a murder they commit or not?.

if you read this far thanks, please comment below. really sorry for spelling, grammar mistakes i might make a post about what i think the origin of religion came from