Going crazy trying to connect to Live on 360

I am at my wit's end with this.

I dug my 360 slim out to play some games. It's been in a bin for a number of years now. It booted up fine. Connection test to xbox Live was successful, if a bit slow to finish. But when I went to sign in to xbox live I got credential errors (different error codes each time). It has been ongoing after everything I've tried, but I can not sign in to xbox live.

Here's all the things I've tried...

Checked Xbox services status (Green) Wired and wireless connections Checked my PiHole DNS to make sure it's not being blocked (Connection Test was successful so I didn't think it was) Added serial number to my devices in MS account Stopped recurring billing for my Xbox Game Pass Ultimate subscription Removed 2FA Reset my account password Set 2FA back up and added app passwords Deleted profile (Now I can't download it again with app password) Tried maybe 20 different app passwords Hard booted router. Hard booted Fiber ONT

I'm on the latest xbox360 dashboard version

Everything Live related is extremely slow.

So with all that said. What am I missing?