I suspect that there are other things going on there, speeds for this technology are generally fine, but you do need to figure out which sockets to use, since the best performance is when everything is on the same circuit.
Disclaimer: I’ve used this, installed it a couple of times and troubleshooting aside, it’s worked for me.









More likely than not you’re confusing modifier keys.
On the Mac, the zoom is [Command] + [+].
In Linux it’s [Control] + [+]
This is pretty much true across the board. It’s sometimes non-obvious because wrappers like UTM try to “help”.
The alternative is to ssh into the VM and continue to use the MacOS shortcuts you’re used to.
Source: I’ve been using Linux on MacOS guests for a very long time.