AITA for shooting the head off a Brawler?

I, Commissar (M), was fighting alongside a Brawler (M), when an Agitator (M), took control of us. When we awoke from our combat driven trance, I turned to the Brawler and complained about how it’s annoying being put under that control. He then told me ‘I enjoy it, alot.’

I determined he must have some deep rooted computing issue and I shot his head off, was this justified??? Let me know what you all think.