OK, this has definitely gotten worse since the latest patch.
My goalie (granted, he's 4 stars with first-team squad status), complained about lack of first-team football. Fine, I was giving my 20 year old 3 of 5 games (4.5 stars, 5 potential). So I give him a good run, at the risk of hindering the 20 year old's development and happiness (I don't wanna lose the first guy, because I know I can't hang on to the 20 year old forever). Then, obviously he's happy with the amount of first-team football he's getting, I'm told he's no longer unhappy when the promise period ends. Perfect.
Mere weeks later, during which period I gave him 2 of 4 starts, he complains about lack of football again. WHAT!?!?!?!?!?!
The 20 year old was hurt a couple of days before and is gonna be out for 3-4 weeks, so I was able to promise him more first-team, but seriously WTF, this is beyond broken...
Regardless of squad or player personality, this is just laughably ridiculous. As was my previous example of a new signing complaining after 10 games into the season, even though he's started 60-70% of games.
My discipline rating (which supposedly affects how often players come to you with an issue) and man management rating are both 16 or 17 I believe. My discipline bar is at 80% (although I think this is just an indicator of your tendency to fine players?)