Ryu was annoying in this episode. So what if Mebius destroyed the comet ahead of you. It sounded to me that Ryu is pissed that Mebius should have waited until they failed at destroying it. It makes you look like a jackass that you want all the glory instead of saving the Earth. Let Mebius do his thing without you guys trying first.
From GUYS's point of view, how would you feel is someone who's been constantly upstaging you takes it too far? Kinda like how some cops in Metropolis dislike Superman.