I have always felt that Zepla's turning point was not because of this expansion or that expansion, it was when she lived through months of stress and existential uncertainty and eventually had to flee and leave her home of eight years in Kyiv, Ukraine, behind because of the war front moving across the country. She went through literally becoming a refugee trying to sort out her life and start over from a tiny room in a different country -- that does things to people. Afterwards she had to reinvent herself, re-establish herself, but you don't easily just resume your previous persona after a fairly traumatic experience like that, and she ended up borrowing parts of the style of other then big gamer streamers like Asmongold to fill the gaps and cracks.
I still don't think she is unfair to the game, just more bitter about.. well, life, the universe and gaming while still using the trappings and language of her previously more cheerful streamer persona.