Is it normal i don't like people who aren't consistent with their dislikes
I understand full well, that most people are just trying to be nice. I get that. However, for the life of me I've always had a problem with people who are basically okay with things, right up until they aren't. By which I mean they really aren't okay with it, but won't say anything until they explode.
Imagine as an example you have a habit of using different glasses, for drinks instead of washing out, and re-using the same one. Your spouse, friend, whatever is cool about this, and then two years later tears into you over it. That's what I mean.
When that kind of thing happens to me, I'm always dumbfounded, like; "Well...you had X amount of time to say something..."