Just thoughts from anon-tech.
1) Did you install the "Next" version, or bog-standard MQ2, when installing via Very Vanilla (VV)? Honestly, if you did a standard install, can I suggest, delete everything and re-install Next version.
2) Launch MQ Next and then one EQ session. Monitor for 15-30 mins and see if stable, but do nothing, just sit still in POK/Guild Hall. Don't install and Plugins or run any Macs for now. Test the basics and provide feedback,
3) If 2) ok, then load a 2nd EQ client and again just test stability for now, provide feedback.
4) Lets see if we get to 4.
p.s. suggest you connect to RG Discord. Maybe able to get "live" support, but may be better to wait till 2pm for US people to come online.
p.p.s. I'm at work so difficult to get too involved, sorry. But I'm running MQ Next and stable right now. Just to provide some comfort.