I've never used gmail itself (that model doesn't fit my mind), but O do use that Google account for some minor stuff. Unfortunazely, I've repeatedly gotten email targetted at someone else having same first name initial and same last name on gmail (address is in the form of FLastname@gmail.com). I've usually been able to get through to those people to stop them and to get them to reach their targets, but in the last 24 months, a lady from Michigan is repeatedly giving out my email address for everything (I've got covid appts, doctor appts, movie tickets, responses to home buying inquires...). I have no idea how to stop this: this would've never happened with any provider that's not owning like 60% of the market.
I am constantly annoyed and I've considered both stopping mail forwarding from this account to mine (but then I might miss that YT premium notification) and I've tried reaching out to many humans on the other side. But I've so far resisted the urge to cancel those movie tickets or vaccination appts, but things just keep coming in.
I can't imagine how are people not overwhelmed by wrongly targetted email: there's more of it than spam I get on my personal server, so spam filtering would definitely not move me towards gmail. And actual spam also gets through on gmail!