How would you react? Need an honest response

[IzHaN80]

I've been exping on the same spot for more than 24 hours i'd say. HHK goblin camps. There is this individual that has been a couple times in my groups. At first, he was looting every damn thing that did drop from corpses. I even had some members of my group send me tells asking me how i felt about having him loot EVERYTHING. As an ouptspoken person i am i confronted hir and asked not to loot all. Today he was in our group. I looted a couple FS and he confronted me about looting those FS, to which i replied, that yesterday he was looting much more and no one did complain until i did open my mouth. Well, in the end, group trains, i get killed. A few has to go, we're 3 in group. One of them says we're gonna disband to reform the group. Once i come back, i find myself out of the group, and this person not inviting me back cause he has now a personal vendetta against me making his own group with others. How i should react? Can this be petitioned? I feel so humillated and mad at the moment.