Forum:My friend hates me.

When me and my friend dueled, he summons his Stardust Dragon/Assault Mode, and I got all the exodia pieces in my hand. When I showed him to win the duel, he tributed his Stardust. I said that Stardust cannot negate the effect, but he said it can since stardust assault mode can negate all effects. I told him he cant negate winning effects, but so on, he said he can....Is there anyway to prove him wrong?