I did the same thing about a year ago as a gmail user since the invite days. Fastmail's import from gmail worked great with all my labels and their ability to connect with domains works well. Great app on android and linux. Strongly recommend.
This echoes my feeling about him centralising power and generally doing whatever he wants with very little pushback.
I'd add Doug threatening to eliminate elected school board trustees and paying his friends 300k to supervise boards instead https://www.cbc.ca/news/canada/school-elected-trustees-role-9.7116535
I've been running LineageOS on my OnePlus12 for a few months and it's been pretty solid for me. Good battery life, but the camera app isn't quite as robust. Lineage on Waffle