There are quite a few TIFs at my workplace that I have to interact with. Like other people in this thread have mentioned, I've never really felt bothered or offended by what they are doing: I mostly just feel bad for them.
Usually from interacting with them I just get the sense that they have been misguided and manipulated into all of this on numerous facets. I directly supervise a few FtMs in particular and they are for the most part decent workers and nice enough people, and I honestly can't say that I hold any contempt for them or anything like that. I just wish they'd get better.
TIMs, on the other hand, seem much more predatory and malicious in how they co-opt and subsequently invalidate what it means to be female (I'm not a woman so correct me if need be, but I'd bet if you're on here than you agree with me lol) They've never felt the same to me: MtFs are always much more perverse from what I've seen - what they are doing feels much more like an infiltration of womanhood than TIFs and their perceived "manhood".