He's intolerable.

[ Sniveling and whiny and unable to own his mistakes? Gamora absolutely can't stand him.

And with another bite of (Peter's) pasta, she nods. ]

I agree. I would understand taking time to be apart, but that shouldn't dissolve their entire relationship.

[ Or, well, she understands in theory. She doesn't exactly have experience to guide her opinions, but she assumes that's how she would want someone to behave. ]

He acts like a child.