All the suggestions in this thread are good, but for anyone who doesn’t want to self-host or change providers entirely (because changing your email is an absolute pain in the ass):

At least get a different mail client. You don’t have to use the official Gmail App to access Gmail! I personally really like FairEmail, because it’s open source, has no unnecessary bells and whistles, and just works. It takes less than 5mins to download it and move Gmail over there completely, with no risk of losing any data or missing any mails.