Hey guys, I am also getting this issue, however, I am not using CephFS and this is based on a new cluster setup with nvme. I posted a question on the forums as well:
https://forum.proxmox.com/threads/ceph-slow-ops.121033/
Just to summarize: new set up, added OSDs, create pools and I get slow ops all the over the place and no good pgs at all.
Tried downgrading the kernel as suggested but to no avail.
Ceph is unusable on my 3 node instance so I switched back to Zfs for now.
Not sure if any of you guys have a solution for this issue?
Thanks!