NO! You have a bad understanding of what competitive really means. An uncompetitive move is something like run away or stall or slow start. Mega kangaskhan was very competitive to the point where everyone was using him to call it uncompetitive just shows your lack of understanding. The word you are looking for is the word cheap. Yes, swagplay is cheap just like gale wings is cheap etc etc.Sorry, but you're clueless. "Competitive" encompasses much more than just what's good. Swagger + thunder wave is strong as fuck, that's why this thread exists. That does not make it competitive.
Often times, the most powerful things are very uncompetitive, in a similar vein to "swag play" and things like mega lucario. Mega kangaskhan is powerful, but that does not make it competitive. When something reaches a point to where it is too difficult to counter, it is "broken." This is uncompetitive as it allows one player to completely dominate the game with little input from their side. "Competitive" is not steamrolling your opponent with pure power of your strategy; rather, it is having an even playing field for players to COMPETE on. Swag play prevents interaction between opponents, resulting not in competition, but an unhealthy environment for the game, which makes the gameplay stale and makes people not want to play.
Swagplay stops your opponent from being able to play the game. It always goes first and the only way to counter it is by abusing prankster yourself. Therefore it has no place in the OU metagame, in terms of trying to create the most balanced and most fair kind of metagame.
Swagplay doesn't stop you from playing the game cause you can simply switch into an electric, ground, natural cure pokemon or highly defensive pokemon with low attack power to counter it. There are many unexplored counters too like infiltrator noivern and infiltrator whimsicott and heal bell + wish umbreon. Do you also think blissey, mandibuzz, rotom get beat by swagplay when they are super common?
Nope not at all. People want it banned because they refuse to counter it because of their pride they think its uncompetitive like you do. Many people here on smogon think they are so great that they should never ever lose against confusion and the moment when they almost lose or lose they complain about it because they don't want to adapt to the metagame in that way and they rather ban things to gain more dominance because that is one less strategy that is involved to taking down their cheap strategy.