You're right that this is bad advice for people seeking how to politically organize to resist right wing and fascist governments-- at best, this is advice for socially isolated people to take the first step out of isolation and to figure out how and where to connect with others offline-- but to boil down its examples of where to find community as "sucking and fucking" and decadence is wild as fuck. The conservative moralism here, in my opinion, does not have a place in leftist politics nor in an analysis of what's ineffective about the quoted text.
The actual issue with the advice given is that it's deeply individualistic and not conducive towards actual political organizing and strategy.
Personally, I also am not looking for political advice that uses only one tool of surviving fascism-- hiding-- as its main tactic. I think it also leaves people feeling helpless.
I do think that isolated, scared people panicking on the internet have a tendency towards real life social alienation and isolation, and do need to hear that the first step is building and investing time in real life social connections. But that's the limitation of its uses.
I don't really know where Maia is from, but I'm also assuming "joining a political party" is talking specifically about an established, existing, major political party. That makes sense to me, because in the US, the DNC is insulated from any real radical changes to their political line with a lot of bureaucratic and political weapons able to neutralize an attempt at larger-scale political sway.
It's short sighted advice.
I dont think the answer is to turn away from political organizations entirely, its to find and form ones that you can actually strategize with. Grassroot ones especially, and potentially smaller political ones, but the latter I don't have experience with trying to work through.
And I would also seek out information on infiltration and counter-insurgency tactics to identify when someone is, intentionally or unintentionally, disrupting the real political action.