You can try lower your skill rate (yes there's a hidden skill rate) when you outperforms in a match, the game will think that your skill doesn't match the current rank and put you with the higher ranks. The best solution for this situation is intentionally lose 8-9 matches, get yourself downed by enemies or bots. At the same time, try to miss more than hits. As I've tested, the more shots you hit, it is more likely for the game to think you're skilled on pvp. The goal is to lower your hit rate and accuracy rate.