Well, the problem is simple - If the game had been looking like this in 2013,2014 I think most people wouldn't complain, even though the fact that there are only really small differences between PC and PS4 versions is really disappointing - GTA PC looks better now - said even by the games in the stream of PC version 1.02 (and there are actual big differences between GTAV PC and consoles version) than TW3 PC
But the bigger problem is, that we have trailers, gameplay material of the versions from 2013,2014 and we can compare them easily with the final version and see what things have been taken out, or doesn't look as good as in previous videos, trailers, screeens, etc..
And that makes people sad, mad and disappointed.. and the handling of the situation by CD Projekt just makes the situation even worse, mainly for the future and the relantionship and trust between CD Projekt RED and the fans, customers, etc.