I'm sorry that happened to you and also glad you're in a better place! :)
Some of my classes use LockDown browser as well and these are computer science courses so there was a lot of pushback due to privacy concerns, so I can sympathize with your viewpoint. Although a majority of students don't cheat, it's still awful that the behavior of a few dictates how the others are perceived.
Some of them use state of the art obfuscation to make this a PIA, others are not that good[0]
The one I've taken a look at(forgot it's name) was using VMProtect and had a competently written VM detection routine.
It wasn't my exam so I recommended that they use a kvm switch instead of fumbling around with vm hiding tools.
Some of my classes use LockDown browser as well and these are computer science courses so there was a lot of pushback due to privacy concerns, so I can sympathize with your viewpoint. Although a majority of students don't cheat, it's still awful that the behavior of a few dictates how the others are perceived.