PS: Also gmaxwell and Co rant about other stuff and point out mistakes/criticize them
Not sure what you mean by this, but pretty sure GMaxwell is a supporter of the CryptoNote architecture and of the Monero project but is rightly wary of the inherited codebase. In fact his enthusiasm for Bytecoin (before the ninja-mine scam surfaced) was the main reason I took an interest in CN-based currencies. Has he become a critic of Monero devs?
I think he'd probably object to "a supporter" as that suggests some sort of explicit endorsement which I don't think is the case. He has commented on the cryptonote protcol being "here now" anonymity that is pretty effective, while criticized some other aspects of it. He has not become "a critic of" the Monero devs that I know of, but of course we are not above criticism from him or anyone else, as it should be.