My Gmail account gets more spam in a week than I've gotten in the two years I've had FastMail. And Gmail's spam filter is surprisingly easy to defeat, considering. For months, putting "- -" at the start of the subject line would trick Gmail and put it in your normal inbox. (I just looked, and it looks like they've fixed it, but back in December it was bad.)

This myth that nobody but Gmail can handle spam needs to die. It was true in 2006, but it is not true in 2019.