If you actually are looking for advice, then in descending importance order:

* Enforce a DMARC policy instead of explicitly disabling it.

* Enforce a strict SPF policy instead of ~all.

* Send over IPv6. Usually stricter rules are applied and not-up-to-snuff emails are rejected at the SMTP level.

* Your provider hosts lots of spammers for their size. Consider switching.

* Enable MTA-STS.

The first two I'd consider obvious glaring mistakes. The next two are less important, but would help. MTA-STS is a nice-to-have.

I can't analyse your DKIM setup, since I don't know your selector. Feel free to send me a sample email if interested.