I doubt any fans would want to sign Cleverley based on previous seasons but we may have signed him as a 'punt' based on his technical ability and game intelligence, because our scouts are better at picking out prospects than the general public are- he's good enough to play a supporting role in our first team in most games, a poor game at Anfield may cause kneejerkers to jerk their knees but sensible people will appreciate that it's not reflective of his overall level and remain patient- even if it might be time to take him out of the firing line it's not time to write him off. Who knows, he may never kick on and may have to leave- but we won't find out unless we give him game time, and he hardly ever lets the team down.
Cleverley is a late developer, most football fans are terrible at judging the potential of any player who is not in the special bracket, particularly if they do not have a physical advantage. He's 24, literally the same age as Herrera who we are trying to sign but he's played 40+ fewer games (and a lot of his games were not in the top flight), he's still a baby experience-wise.
Every player has poor games (we tend to freeze at Anfield anyway), young players tend to have more than experienced ones, but thats why we need to have the players who can come in and take the pressure off them when it's time to. Unfortunately, we're shockingly short in midfield at the moment so there is more pressure on Cleverley than he's probably ready for. Like I said earlier in the thread, people won't appreciate what he does for the team until he has an extended period out of the side and we still have moments where the other team is on top, because that is football- sometimes the other side play well and you don't.