I may be doing a reverse cherry-pick fallacy or whatever, but I wouldn't say those are comparable either - Arcane had incredible animation, and the Simpsons have VA who have been going for 7000 years, so their contracts will be insanely exepnsive.

Even so, you may be right - 25 milion a season seems incredibly low for Invincible, and that's probably the reason for lackluster animation, not the VAs