What would you call someone who rather not have something than have it with bad sides?

I wondered this when I was thinking about relationships but could apply to other situations. Let’s say someone has troubled relationship with their siblings so they’d rather not having them to putting up with them. Or they ended up with a pet but they’d rather not have it and not deal with it’s responsibilities. Or they are assigned a project with good prospects but wouldnt want to do it because of risks.

I was thinking more of apathetic than slothful. I thought picky or idealist but they’re not quite right.