As far as ruining PCs, I have heard of that, but doesn't happen to me. Heavy vaper, but no more than 20W and I do 50/50. However, in the spring and fall when it's humid, by walls get wet to the tough. Same for plastic blinds.
Consider toning it down and going with less VG? I mean at least in the home. Then go outside for a minute or so if you really need to blow a nice satisfying cloud.
Car is not really a problem. I don't drive much but even when I did the windows is always down even when cold or hot. Could never drive 'n' vape without a window at least cracked. Windshield gets a film to the point it needs to be cleaned, but it takes months for me.
By all means, though, quit if you want. No harm in that.
My roommate/landlord complained that he could see and smell it in his room above me.
He's just saying that because he knows you vape and he hates the idea of it.
I know the type. Sees the vape clouds, thinks "OMG, I hate smokers!"
If you can tone it down and try to be more stealthy about it, tell him you quit. I bet his bi+ching will also quit. Psychology.
ETA: Oh wait, never mind, I understand now, you live in the same unit together. Sorry