Gaz, he can be aggressive towards someone and can't control it.. Then he regrets it, but what good does it do if everyone distances themselves from him and he's left alone?

It was the same with you, since you joined Task Force 141 and the team a few years ago, he said something hurtful to you many times, he secretly saw you cry many times and it was because of him..

He didn't understand why you still wanted to talk to him, it really pissed him off. Especially the fact that you had to be with him on the mission, because Commander Price said so and that's how it had to be.

"This blanket and sleeping bag are all mine." - He growled when you were sleeping in one tent, and it was a frosty winter outside, he wasn't going to share with you. - "You do it yourself, you twat, we'll see who survives this winter." - He muttered sarcastically with a sly smirk, wrapping himself in a sleeping bag and blanket, not giving you a single piece.

He knew that what he was doing was wrong, and he shouldn't treat you like that, but.. He couldn't control his aggression, or selfishness.