For me, I just want to avoid using google services as much as possible. I'm the product that is being sold with Google, and that bothers me. I'm not tinfoil hat live i a bunker privacy minded, but I'm doing what I can to live a normal-ish life but keep my details out of reach from companies like google.That said, I am really considering moving my domain away from Apple and back to Gmail.
With that said, I've only heard good things about how efficient google is with handling spam, and how inconsistent apple is. As I mentioned, I get too many false positives, my mortage company and banking emails (two different organizations) more often then not end up in my junk folder. Even the confirmation that I paid the mortgage can end up there. The confusing part is, not all emails from my mortgage company shows up in the junk folder.
As for Outlook, yes, horrible product, and I don't use that email address at all. My wife has a hotmail account and she struggles with it getting compromised (even though she changes her password often) and getting inundated with spam.
As I mentioned I'm transitioning over to protonmail and it seems to fit the bill for my needs.