What have you tried?

Mostly getting stuff done on the Windows machine in the next room or playing music off a different stereo or playing music on cassette tape or minidisc on the same stereo, etc. It's easier to fall back to a world of 20th century electronics where latency is imperceptible than it is to dive into a world of third-party apps that were all designed around somebody's inscrutable KPIs but didn't consider at all my convenience or inconvenience. Probably it is Creative Cloud updating or some software for the mouse or some kind of crap and if I sat in front of the machine for 30 minutes it might settle down but it's rare that I sit in front of it for 30 minutes. It used to be that kind of thing wrecked the Windows experience but over a long period of time Microsoft did a lot of work to balance to load of startup processes and mostly you don't feel it.

My wife browses the web a lot on that Mac, she hasn't complained since I installed Firefox + uBlock Origin but maybe she expects it to be slow.