Thank you for the training, I've learnt a lot!

A senior at my company taught me a word which I've known the meaning of for many years - "passive aggression". Working with improvement often means working with change. Everybody reacts to change differently. The group categories as "passive aggression" is one of the most difficult one to deal with. They'll give the impression that they agree with you and then subtlety trying to do anything to sabotage. For example make simple things complicated, finding illogical reasons to justify their acts and so on.
If you feel like you're unfortunated enough to always cross path with a certain type of people that you hate, there can be several reasons:

1. You're really unlucky. (Come on, what's the odds?)
2. There's something about you that drawn them to you. (Probably you're of the same kind)
3. Your behaviour made them react that way towards you. (Wake-up call maybe?)