For me the Thanos Quest feats imply that a) he just keeps on trucking regardless of what happens to him, as though it doesn’t matter at all, b) an almost rubber-band-snap-back response afterwards. Like stuff starts to happen to Thanos, but it never actually takes because the combination of his Eternal physiology, other powers, ridiculous willpower, and Death’s blessing just respond with “Aaaaaaaaaand nope.”
I can see people’s take that it happens and he has to subsequently force it back, which wouldn’t necessarily work with speed steals (because his reactions to force it back would be massively slowed), but to me it just feels more like “I see what you’re trying to do to me on a fundamental, existential level, but I choose not to have a single **** to give about such trivial things.”