Reporting Toxicity

Hey y’all just wanted to report this player on Xbox - “Let me solo him” with the gamer tag “Boo Womp” This was my first fight with the final boss and this dude was just walking all the way to him in the first phase while me and my teammate are fight for our lives then second phase hits, both me and the other guy get knocked down; not only does he just still walk to the boss but every moment he got he did the pointed down emote on us while just taking his time to kill him and dance around making sure to stay close to our body’s at all times to do emote. After he died he immediately just messaged both me and the other guy “Your welcome for the carry btw”. Like I was looking hella forward to killing this boss then he just literally ruined it. Like just why??