I think a lot of people are basing their opinion on PSG game where he was pretty good and it seems that a lot people here don't like Mathieu (because he is 31 year old CB who costs 20M) hence the hype. I basically think that he is more reliable this season than the last season and if Pique, Mathieu, Mascherano is not available when there is no fear of Bartra replacing them.
I have seen on other football forums and on forums about manager games:
1. people are for some reason obsessed with younger players (I am personally not, so I can't understand that hype)
-- basically, even if you have a good team, most of the fans are always planning ahead are are looking for new and younger players
-- usually their logic is something like:
a) if both players are equal, then a younger player > older player
b) if an older player is better, then still younger player > older player, "because" we need to think about the future, blah blah
2. also, the other obsession is with homegrown players
Again:
a) if a homegrown player is equal to a foreign player, then a homegrown player > a foreign player
b) but also, if a foreign player is better, then still: a homegrown > foreign player, "because" he loves our club more, we need domestic players, they are special, etc
So, imo, Bartra is not that good at all, but he is just young and homegrown, so, people are overrating his skills (with "cule glasses" and based on these obsessions mentioned above) by 20-30%.
This is why people outside this forum don't rate Bartra. (Because they aren't obsessed with our young and homegrown players).
Some will say that other people are wrong, others will say that other people are just realistic about Bartra and similar players, and not biased.
I personally don't care if our player is 18, 25 or 33, or is he a Cameroonian or a Catalan, as long as he is playing good and as long as we are winning trophies.
But again, for too many fans, "being young" and "homegrown" is more important than a lot of other, objective factors.