I know! Same here. I'm on a team and I could careless who "steals" my kills. People got to realize they are on a team.
I don't get this either. I recall one match where dudes were flipping out if I went after anything they had started to go after. The vast majority of the matches I've played are mostly full of people trying to work together and make it through a match by any means necessary. For the record, from my understanding, all credits and experience are divvied up evenly, but the score at the end is simply for showing who pulled the most weight? Is that right?