Running your own DOH server comes with it's own set of risks, depending on your adversary. If you're the only person using a DOH server, then any requests that server make must belong to you. I'd argue that it's better to use a public server and hide in between the other users.

My main issue with DOH is failing to honor my internal DNS overrides to provide local addresses for services on my local network (externally the DNS entries point to the external address but internally the LAN address) It is so annoying fighting against DOH for this