Captain Planet analogue goes crazy and kills coal workers - Morty is devastated, he agrees it's right to feel bad the planet's dying but the ep implies the correct answer is to do nothing.
Not even 'subversive' Rick and Morty could dare suggest blowing up coal/gas plants without demonising the act (it's quite doable to do such a thing without killing workers....)
Ala a recent trend in modern blockbusters where villains are morally correct in their actions right up until they kills civilians for no reason- just to force a third act showdown, effectively negating their positive ideas.
Also there's an opening joke that is an explicit merch promotion that isn't even ironically done. Just a shitty shirt effectively done to camera. At least Schezuan sauce actually made sense in the show, this was just pure shit. The other eps are good, but the industry in culture industry will rear its head anytime you get big.
The prior episode is basically "Oopsie! We kicked off a genocide!"
That said, the current episode seems to explicitly revolve around the idea of selling out. The consequences of people getting old and cynical and greedy are what's being parodied. And the way Morty - who was more horny than invested - ends up selling out as soon as things get uncomfortable, is a predictable liberal attitude to the point of being its own trope. And the realization, at the end, that Earth is just one more disposable commodity for these characters while Morty's feelings are the real treasure to be defended is another common liberalist trope.
On a surface level, it definitely looks like crappy liberalism. But R&M is a show about horrible people doing unconscionable things all the time. Of course, other crappy liberals are going to sympathize with a show about crappy liberals. It's sort of like how STEM chuds idolize Walter White in Breaking Bad or asshole New Yorkers sympathize with Jerry Seinfield.
I'm not losing any sleep over this shit.