Constantly this. 

Pre pressed buttons for first time passes and first time shots don't do anything.

Players feel like they're running through mud, don't turn, can't shoot, tackles just bounce back to your opponent, AI has been dumbed down to the point the players actually look like they've never played before.

And then the next game it all goes your way (Well, one game in 10 does) and its not in the slightest bit rewarding knowing the other dude is just suffering the same BS. 

And don't get me started on people celebrating their horrendous goals from gameplay so broken. 

Yet offline its generally OK. But I don't want to play offline. The rewards aren't as good... 

I've never known a game so broken!