What's unjust about his advantage? Better question - as someone with an inferior GA roster, are you willing to take lesser rewards for a more competitive match-up? Same question, put differently, should your guild mate be punished for having a more efficiently built roster?
GA has been out for three months - plenty of time to make changes to the way you're developing your roster if that's what you want to do. I'm assuming you're Bubblechomp Rex in-game, and I understand why you think you're being aggrieved somehow. I have a 2.3 M GP account that would probably beat your 4.2 M GP account in this format (using a 5 squad setup). It has an MF, you don't. You can't clear the ship zone. It would clear yours. There's a chance it would beat you on points in squad based on your mods and depending on what you placed for offense and defense.
Part of me gets that it's ludicrous that a 1.9M GP differential is meaningless. But, what's the answer then, match on what? And why? So people that didn't focus their rosters get the same rewards as people that did?
I'm not asking rhetorically. I really want to understand what's driving the "lazy garbage matchmaking" crowd and what a viable matchmaking alternative looks like to them - outside of "one I can win"