My workplace is messing with DNS as well, probably to filter specific websites, and I would not mind it since for the context of my usage that is perfectly fair.
But their DNS responses have latency spikes every couple of minutes of 1-2 seconds that was driving me crazy. I simply enabled DNS over HTTPS in Firefox and everything feels so smooth now.
I have no idea how my coworkers seem to be so insensitive to it.
They might be proxying all your traffic through a "WAF". I've noticed that even quite a lot of regular websites linked on HN on "non standard" domains are simply unresolvable on my work network.
[dead]
Enabling DoH on a locked down workplace network sounds like a way to get fired.
But I guess that if they let you do it they're probably not competent enough to catch you.