The biggest shows last year were: Demon slayer (plz don't confuse, this one is about 1 good boy empathetically killing rich people allegories), Kaguya-sama: love is war, spyxfamily, Lycoris recoil, chainsaw man, bocchi the rock! and Gundam: Witch from Mercury.

Chainsaw man and Gundam have heavy leftist themes. Lycoris recoil is gay, and along with demon slayer are heavily action oriented shows. The rest are cute comedies aimed at normal people. Bocchi was a word-of-mouth smash hit, but the rest of these shows had marketing budgets that probably dwarfed the entire production budget of something like World's end harem.

All the thinly veiled far right isekai stories usually originate from studios desperate to adapt self-published webnovels in the chase for that sweet sweet sword art online money (goblin slayer, shield hero), but they're finding that well to be dry cos those stories only got "popular" because only terminally online Nazi's read them, and the mainstream continues to be dominated by Weekly Shone Jump adaptations because WSJ has editors.

And even in that web novel space there's push-back-we just had an isekai where the protagonist does the radical action of... Killing slavers and emancipating slaves. (reincarnated as a sword) edit: So I wouldn't get all doomer about anime just yet. Until something like goblin slayer gets into WSJ, things haven't gotten that bad.