Some times the joy of winning doesnt let you think if its rude or not
That just makes it rude
and immature. Well, that's just me. Others obviously disagree. And who am I not to grant them that privilige?
Let me elaborate on this. It's important to me. There's a sort of "holy union" in the match, shared between just you and your opponent. In the end one wins, and it ends by acknowledging this. This acknowledgement is done by offering congratulations and, simultaneously, consolations that show a proper, deep respect for that union shared in the match. After that, you can break out of it, share your joy and grief with the second circle and beyond, obviously including your own coach, your opponent's coach, and the umpires, maybe your teammates if they were there in support. Good to go, and do celebrate or mourn your loss. But to me, that little tribute between victor and vanquised is important, a vital part of match closure. I don't expect everybody to share this, but to this standard I hold myself.