I think endgame
Which phase of game is most important?

I agree that middle game is more important. I have seen many times me winning or the opponent winning because of the attacks and the plans we prepare in the middle game. This gives us an opportunity to prepare for the endgame. So yes, according to me, the middle game is the most important phase of each chess game.
There are three main phases of chess.
Opening, middle game and endgame.
In opening we prepare our pieces to attack.
In middle game we launch and execute attacks and plans.
In endgame we finish off with the advantage we get in middle game.
In my opinion middle game is most important as we execute our plans there.
What do you think?