Is Build 118 (Canary build) broken? The browser will close 1-2 seconds after I open it.

The incredible problem, now, is that my work account was a free trial Azure domain that I created years ago to try some previews of enterprise products etc...
Of course it was abandoned, not paid and just there for eventual learning purposes.
The day I logged into this broken "work/school" domain with Edge Dev and Edge Canary I knew that the rollback is impossible.
It is not only an Edge issue. It is an entire machine issue. Since the main "Tenant" and Global Administrator of the Work School Account is me and the domain has no certificates, no active services, no AD policies, it's an empty container outdated and dangerous. So my Win 11 Pro is full of failed certificates loading errors. E.G.  I can't use the Microsoft Editor of my Microsoft 365 Personal (on Edge) because it's linked know to the broken work account that can't activate it (it obviously hangs) on Edge. Microsoft editor works on Chrome, no way to have it working on Edge. A terrible merge of the two accounts that's hard to remove it I'll surely have to reinstall everything from scratch if I not intend to pay Azure (ENTRA ID), register the machine on Intune, then remove any group connected with Microsoft 365 for Business that at the time that I created this "onmicrosoft.com" domain was on trial....
I'm shocked!
I couldn't believe it. And I can't believe it.
I talked with Microsoft by chat and they say that it is all so experimental and for insiders, they don't have any solution.
I hope that my personal account is not compromised even after a Fresh install.
I will avoid to use any OneDrive Backup and and see what happens step by step.