I got Venti up to 80 so far and my main tactic is Venti ultimate + run in with Hu Tao, use her elemental skill then ultimate skill.
It will usually kill all small enemies and severely fukk up any large enemies.
However, sometimes Venti's ultimate will keep enemies up in the air so Hu Tao can't touch them at all.
So that's another negative to take into account. If you mainly play with a catalyst or bow user it's not an issue, though.
Just take a break man. The game ain't going nowhere.
I played "Final Fantasy XI" (the first online one) for like 15 years but I'd take breaks every few months. The major difference with this game is all the limited stuff but you can pop in occasionally and check if anything interests you. I can pretty much guarantee Zhongli is returning in 1.5, so if you didn't get him you can come back for that, and 1.6 should add the new region Inazuma.
Fred.