On Chess.com I can log on and click a "find me a 10+0 game" and I just get a game. On Lichess, as far as I can tell, I have to scan the list of games, compare them to my rating (which I can't even see on the main screen, and don't trust at all since it swung +150 points on my first game..), and then pick from the list. It's a huge mental barrier on "playing a quick game of chess".
I also really wish that the chess UI on lichess showed me what pieces each player had captured. It seems to.. sometimes.. but not always, which is confusing. They constantly disappear. Also, the pieces that show up above/below the move list on the right side both appear as black pieces (when they actually show up), rather than of the appropriate color, so the display could be read as both "pieces you have captured" and "pieces you have lost". I'm sure I could get used to this but it's confusing as a new user.