I haven't seen any of She Hulk.  It looks very meh.  To me all the shows have looked very meh and been very meh.  This twerking stuff is new to me but it makes sense in light of the sheer mehness.  

Giving these folks as much credit as possible I assume they don't like the twerking as an extension and prime example of how lazily they are treating the character.  If it's actually purely "she shouldn't be twerking" or "Megan is trash" I have to imagine they work in a field entirely devoid of female coworkers.  I'd understand more if it were during the actual show and an extended scene without character development.  Although even then with the crackerjack CGI it wouldn't cost them much.

Loki was probably my favorite of them, of the ones Ive seen.  Female Loki was cool and the whole Loki falls in love with himself IMO made a lot of sense.  Falcon/Winter was a political vehicle and heavy handed at that, IMO.  I didn't see the Ms Marvel one or the Hawkeye one.  I'm pretty sure there's another I did see but I can't think of what other tv shows there have been.

I think a lot of the problem, from both sides, comes from creators and corporations making a show or movie not out of love or creative vision but out of a desire for $$$ and out of a need to create something in a particular IP because they own that IP and therefore just must do something with it.  So they hire someone, ideally someone they can can use in marketing, to produce something, and that something is guided by what is marketable rather than any particular vision or long term plan.

The general frustration with stuff like that leading to folks over reacting.  Both creators, in the form of excessive direct to the audience rants like She Hulk's anger speech, and audiences in the form of shitting a brick over a what 10 second clip of She Hulk twerking with a professional twerker.