why my opponent can skip my celebration while i cannot

No it doesn't help who ever told you this helps is a lie they are using cheats or taking advantage of glitches they know about 

@SumFiiin I had always wondered that myself. I find when I'm playing the opponent is able to skip my replays (I usually skip my replays anyway, to keep the game going) and then when they score I have to watch their replay. Thanks for that info, I'll give it a try

Make sure you have "hold to skip" turned off found in the Visual menu in your Game Settings.

This should help most of the time.