1/ Your internet connection, especially upload bandwidth and latency matter a lot.
2/ Zoom's desktop app performs very well, but its web version is atrocious. Not just because of the dark patterns they use to force you to install the desktop app, but also its performance is terrible compared to its desktop version, as well as worse than almost everything else. Unfortunately, I don't trust them and refuse to use their desktop app on anything but my iPad.
3/ Meet used to be bad like Zoom on web 6 months ago, but has improved a lot and is slowly approaching Zoom desktop in performance. I have noticed that Meet on my work GSuite calls at work perform much better than on my personal account. This might be explained by #1 above I.e. my family has worse internet connections than my coworkers, but I am not sure if all improvements have been rolled out to personal accounts.