That was my case too. It was mostly when I installed the prometheus-operator that things would go south, even if the nodes themselves were perfectly healthy and underutilized.
I like the autoscaling and the infrastructure as code, and price for DOKS is good.
In the beginning I was even running everything on a one $10/mo “cluster” (cheapest DO offers). Even Postgres and Redis, all inside the cluster.
As I got more customers, I needed something less risky, so added more nodes, and moved the database out.
But to be honest even the 1 instance $10 cluster was fine.