Yeah, I’m pretty much on the same page as Superweapon here. I really like 80s and 90s anime, and some 2000s anime can be pretty great too, but it’s hard for me to find an anime from the past 15 years that I can unconditionally enjoy.
There’s still good stuff being made and even getting theatrical releases in the US. If you’re interested I’d recommend looking into the films of Makoto Shinkai. Especially his last three films (Your Name, Weathering With You and Suzume). I’d also recommend others like A Silent Voice and The Bear and the Beast.
And while you do have a point about the flood of isekai and fan service. There are still outstanding series being made like Your lie in April. You just have to keep an eye out for it.