The problem with these kinds of threads is that it takes the negatives/wrong sides of the caf and puts it in the spotlight without even hinting at those who had differing opinion. If 3 people talk about a player and 2 people like him and 1 thinks he isn't good enough and he turns out to not be good enough then you can't attribute those 2 peoples view to the one who didn't agree.
"The caf" isn't an entity, people disagree on here all the time. About everything.
Redcafes dreadful signings list
Ousmane Dembele
Freddy Adu (vintage feel)
Declan Rice (maybe premature)
Arturo Vidal - when right on the cusp of decline
Jack Wilshere - Phil Jones and luke Shaw injury list multiplied by ten
Tom 'QB' Huddlestone
Jack Rodwell
Timoue Bakayoko
Alvaro Morata
Mario Gotze
Eric Dier
James Mccarthy
Nicolas Otamendi
Ron Vlaar
Kevin Strootman
Samuel Umtiti
Yerry Mina
Nigel Reo Coker
Gabby Agbonlahor
The not United quality list
Virgil van Dijk
Sadio Mane
Bernardo Silva
There were tons of people wanting VvD, Mane & Silva on here. There were also tons of people who didn't rate some of the dreadful-list. And who is to say that we couldn't do with some of those players back then or even now?
We play without a DM and have no real alternatives. Vidal, Dier & Rice would all even now be players that would have improved our midfield, and we could still do with Dembele despite his misses for Barcelona. Last season he had 14 goals and 9 assists in 42 games while our top scorer was Pogba at 16 and Lukaku at 15.
Some of those players have also been unlucky with injuries and have shown qualities when they weren't injured, like Strootman & Umtiti. You do realize that Umtiti would start for United easily if he didn't struggle with injuries and people wanted him on the off-chance that he could sort out that part?
Normally people on forums can also judge, in most cases, based on what is shown in games only, and a players development or regression is something that you'll have to know a bit more of their professionality or just have future-sight to be able to see. That's not something most people even engaged enough to sign up on football forums will know about players outside of their own club, let alone players outside of the leagues they follow closely.