SMTP service

I've been happily running my own mailserver for ten years, but recently, the overlords (garbageMail and MicroShit) have been blocking my messages. I think I knew the day would come when they successfully push me out of SMTP, and it's today. I have 100% compliance: SPF, DKIM, TLS, DANE, DMARC, etc. yet everything I send goes to spam. Emails I reply to (with reply headers) go into spam. How can they even justify it?

I don't want a full inbox (pop/imap). I'm just looking for a privacy-friendly SMTP service for sending mail with reputation. I'm not mass-marketing so pretty much whoever is cheapest per month and respects my privacy.

Looking at like, mailgun, simplelogin, proton? This is so sad.