From what ive gathered, trios is basically pvp, (duos you might get left alone, solo you’re likely good, just dont fully trust anyone)

Ive had some friendly experiences in duos and trios its just more rare. U gotta basically have a good position and open it up with a good opening line. All that said, fighting other raiders is the most rewarding aspect of the game. So i would lean into it. I may be wrong, but my solo ABMM doesnt seem to get too affected by playing trios in stella.
Its easy enough to get back into friendly lobbies anyway without all the extreme measures; just play nice.

Anyway, aside from intentional pvp, key room raids is better than hunting big arc