Sounds like a you problem I've had multiple FreeBSD systems on vultr for over a decade and never had sshd issues. Of course I also use an alternate port and ac

Sounds like a you problem I've had multiple FreeBSD systems on vultr for over a decade and never had sshd issues. Of course I also use an alternate port and active fail2ban to block those who insist on any brute force for any protocol. 128K active blocks currently.