Being a fan of One Punch Man Anime I get why One Punch Man Season 3 haters aren't even mad that Season 3 isn't as well animated as Season 1, they're actually upset that it's not even as well animated as Season 2. For example take the fight between Garo and Tank-Top Master for example, that fight alone looks better than anything we've seen from Season 3 so far.
Each attack really feels like it has impact behind it because the frames are there to support it. And this is just one side fight that happens for like two minutes in Season 2. There's way more than this.
Like Garou vs Genos at the end of Season 2, where once again, every single attack feels like it has genuine weight behind it. And remember, many people consider Season 2 to be a major downgrade from the animation we received in Season 1, and even then, it still looks pretty darn good. The fact that Season 3 is an even bigger downgrade from Season 2 than Season 2 was from Season 1 is the real issue. And they're much easier to compare because both season 2 and season 3 are done by JC Staff Studios.
This is what JC Staff would have been capable of for One Punch Man Season 3 if the production committee actually gave them enough time and the right people to work on the series plus a larger budget would have also helped.