Yep, Bitcoin Core (Legacy BTC) has many user experience issues. I have used it since 2013 for online purchases and to buy other coins with. I probably have made over 2000 Bitcoin transactions since discovering it 5 years ago. There was no issues until late 2016, when block size started to cap out at 1 MB. Even with blocks not full currently I have seen it take almost 1 hr. to get 1st confirm.