I'm sure you can and will create your own parameters.
Different coaches are good for different things. Allegri doesn't seem to be the guy for this situation.
Anyway, it's besides my point. It's not like Kulu only had Allegri as coach. Football is more complex and away from this coach and awful situation it can simply be that PL football suits him well, and playing in a winning team helps a lot. Not every reply has to be about how shit Allegri is and how he ruins everyone, that point is well and truly overstated.
Well to me not every player is born to be Messis, Ronaldos, Del Pieros, or Zidanes and that's why football is played with 11 players.
Kulu isn't going to be the biggest star like them. His natural talent and his football brain aren't on their level.
He's a good team player and when entire team struggle, players like him will suffer too. But that shouldn't be used as a standard to see his real worth. Ups and downs happen
btw I'm just using Allegri as an example, cause he's the only closest example I can think of since he's in difficult period right now.
But sorry if that makes any Allegri throaters get offended
