To be honest, I think the quality of anime production wise (not content) has been pretty bad for some 5 years now. The likes of Chainsaw Man (which has its own criticisms on this, too) are mostly the exception, you see a lot of poor modelling and slap-dash animation, more than I remember being common back in, say, 2013. My suspicion is there is a deluge of sequels nowadays, and with BD sales meaning less across the board a lot of these shows are done on a crunch-heavy, last-minute basis, because they'll make their money through streaming and merch anyway. Newer IPs tend to be better in this regard, probably because they're not established.