The rule that SUCKS is the game abandoned after one minute of being disconnected. I have lost SO MANY GAMES because the network I am on is a shared network and so I am constantly being booted momentarily. It usually lasts for only a minute but thats all it takes to lose the game.
following features of Chess.com bug the heck out of me
kaynight: I can appreciate Chess.com while at the same time wishing or suggesting that certain things be even better.

If you want constructive feedback on your comment, post it here; https://www.chess.com/forum/view/suggestions/all-the-reasons-we-hate-v3?lc=1#last_comment
brock-the-rock-star: I agree, losing a game where you have to very good ideas going is very irritating. on the other hand, people with good connections don't want to have frequently interrupted games. I think the solution might be that the 1 minute disconnect rule can be the default, but folks with unreliable internet can issue a special seek where the rule is 4 minutes or something. If both players have bad internet, they would probably rather play each other than get forfeited playing in the group of people with better internet. Cheers,
Chess.com is free and great, but the following things bug the heck out of me:
playing blitz, the 'sand shaker' effect lets you know you are way low on time. But then it goes away a few moves later, lulling you into thinking you have built up time, and you lose in a winning position!
after beginning a game, the text in the box will 'jump' 'Oh, an important notice, like I committed a foul or the game is about to abort' No-- the server is letting you know 'you just started a game', five moves into the game
there should be a choice to slightly animate moves-- i.e. actually see a move happening-- how many time have you blinked and looked up to realize a move was made, or hear the sound alert, but not know which move your opponent made, and lose on time scanning the board or looking it up on the move list?
there should be a slightly more obvious indication that it is your turn, more than just the time box going to grey or white-- how many times have you looked up to realize your clock has been running the whole time?
time should be indicated by a secondhand or hourglass, that the mind interprets instantly. 'How much time do I have left? Oh let me read the number and think what fraction of a minute that is, wait, I just lost on time'
people who 'run' after winning. not everyone feels a rematch obligation, but about 40% or more of chess players do. there should be a 'best two out of three' challenge option, so people know in advance whether they will get a rematch or not
3/2 is really 3/1 or less with lag. It should be 3/3.
the automatic annotation of your game is hard to follow-- especially back to back inaccuracies or blunders. Not sure how to fix it