This is one of those things I keep hearing but in my case I experienced the opposite. I have been using OVH for a long time, and their paid support is actually really good.

One of our projects used to get ddosed and as a small company the only reason we managed to survive was thanks to OVH. When the attackers kept changing their attacks, we were direct to talk to their engineers and they helped fix the issue, all we had to do was send a bunch of packet captures to them.

Over the years since then we had a few issues and every single time their customer support was really helpful.

I have used paid support from google, azure and amazon, but I have had a better customer service experience with OVH overall.