People pleasers can cause people to dislike them in a workplace, ironically. Being a people pleaser in software dev very often means you will over-burden yourself because you'd rather say "yes, I can do that for you" than "no, I don't have the bandwidth for that".

I'd rather a teammate who is honest about their current limitations than someone who tells me what I want to hear. If someone admits they are stretched thin, it's now an "us versus the problem" to find why you are so overtasked. If someone consistently takes on too much (because they can't say no) and causes the team to miss deadlines, it's now an "us versus you" problem.