Should I play 1vs1 Competitive mode?
If you are a rookie or an amateur at 1v1 then you should avoid the competitive mode. The 1v1 competitive mode pits you against ranked players that have a similar or higher rank to you. Each match wins you trophies and increases or decreases your rating depending on the result. This makes this mode extremely hard to play as you keep progressing with your scores.
On the other hand, it is a great way to keep yourself on the edge and a great motivator that will keep forcing you to get better for the next match. You can use this game mode to climb the leaderboard in a bid to become the best player in the world at 1v1. It would be a good idea to practice for a few days in order to improve your skills if you want to keep your winning streak going in the competitive game mode.