Follow up to:
https://civitai.com/articles/13857/please-report-issues-with-onsite-generation-performance
Civit responded to my elaborate complaint ticket after mere 3 weeks. Generic response with ambiguous promises, as expected. It was their last chance to regain trust, I will now force me to be more opportunistic about this place.
Stop thinking this is a nice place, maybe some people are, the place is not.
Oh and if you have banding in your flux gens, you can ask for a refund.