My oh my, such needless hate. Don't worry XYZ DC, those who can play you right (and actually know the game) will give them a REAL reason to hate you. Why these "players" be thinking everything must be done in one turn anyway? XD
No one is stating it must be summoned turn 1. The issue of XYZ DC isn't that. It's taking up SO many resources (4 cards minimum, 5 if you include protection cards to protect your fusion materials for a turn) so that you won't have the cards in your hand to activate it's effect
And yet, there are other favored cards 'round here that can take up just as many resources to pull your combos and you ain't raggn' on them. So shush your bs and move on.
what other cards take as many resources and time? the only ones I can think off are gate guardian, blue eyes shining dragon and Perfectly ultimate great moth