My team can't kill invaders, I invade I instantly die

Actually feels so crappy, whats the point of this mechanic it doesn't seem to actually offer any sort of real PvP engagements when the people I invade someone have wallhacks and instant snipe all max guardian Rank full teams of them. Why? you put me in parties of people similar Guardian rank vs max Guardian Ranks that instant kill us, then you put me against max guardian rank teams when I invade??