I think the domain rep is worth less than IP rep. I had occasional issues sending issues when I self hosted on a VPS. When I moved my domain to Fastmail I haven’t ever had my emails go to spam.
Most home and VPS IP ranges have negative rep.
As a tip, go to a VPS that's had a history of being very selective of allowing SMTP traffic but still allows after some kind of review. Cheap providers that never did any blocking probably have bad reputations for their entire address range.
I've been successfully using VPSes to send emails for 20 years.
I am sending from SES. Interestingly, I didn't have a problem getting the email delivered to inbox in fastmail despite having an aggressive "protection level".