If I may…..
You’re conflating some things that are important to distinguish between. I (and many others) run nodes not to mine but to interact with the protocol in the designed (and intended) P2P way.
Without any “middleman” or agent.
This is a big part of what makes Bitcoin Bitcoin.
I go through my freakout moments from time to time as well, but in the end, if this network is as fragile (to bad actors) as you are saying, then it was worth nothing to begin with.
Sit with that. If it bothers you, sell your bitcoin and move on. Bitcoin doesn’t care.
Peace ✌️