Are you able to read properly? Because yeah, everyone has been saying Cleverley is great for ages...
Chelsea didn't sell Mata because he wasn't good enough, but because he wasn't a Mourinho sort of player. Moyes panic-bought him, though, but he's a very good player. You can't even compare Mata and Cleverley because they don't play the same position.
Everyone has been after improvements to the team as much as you, and now we're finally working on that, it's too late but we managed okay until recently, to be fair.
All your suggestions for signings have mostly been even more awful than the players we've signed, too.
LvG has managed many of the best midfielders in the world, there's no way he looks at Cleverley and thinks "yeah, he'll do a job" - no way. Zero.