When everyone's a degenerate, no one will be
Even though I don't necessarily agree with the sentiment that all those shows are bad, most of them are at least decent in SOMETHING, I don't think even RWBY can say that.My theory is that if RWBY was a Japanese production made by a semi-competent animation studio it would be considered as standard shounen shit that weebs would eat up or at the very least not give it the shit and criticism it deserves.
I think a more correct assessment when comparing RWBY with bad anime would be that anime series that manage to be worse than RWBY like for example the entire Fate franchise, Highschool DxD, Redo of Healer, Sword Art Online and much more know their audience and actively pander to them. RWBY on the other hand suffers from kind of a schizophrenia if it wants to be a family friendly show or appeal to the young adult audience (disregarding the pandering to shippers).
Fate has pretty stellar fight scenes that are well choreographed and nice to look at, DxD has a competent plot for it's genre that doesn't feel scribbled down as it went along (earlier on anyway) and SAO at least tries to give some characterization to it's characters as minimal as it is.
What does RWBY have by comparison? The music is pretty good but in terms of creating a series it isn't anywhere near as important as it is in something like games. It's just subpar in nearly everything else and it only manages to scrape by because of it's devoted and mostly crazy fanbase.