It's frustrating because the App absolutely doesn't need it. I use the native .app, but I've never run their installer. Instead you can just unpack it using command line tools (I even wrote a script to do this [1]) and… it runs just fine! No privileges, no special installation. As best I can tell, the installer is there to install a bunch of ancillary nonsense.

I did one other thing when I discovered their app auto installing a launchd auto-update service:

    rm -rf ~/.zoomus
    sudo touch ~/.zoomus

This makes a file with root permissions where they hide their auto-update script directory. This causes their code to (silently) err out and viola, no more launchd junk.

[1]: https://gist.github.com/caldwell/c212119fffd92a1d706c0a9b00f...