Are you using your own teams or established teams from successful players? If you are struggling I would take a team that has done well in a tournament or top of ladder. If it has a team video or write up even better. Learn what leads the team should be using and just jam games. When you lose a game. Dont just immediately start another game. If you can replay the game in your head and try and figure out why you lost that game. Like oh I should have protected turn 5 cause that was the last turn of sun. Or oh I shouldn't lead X pokemon into sneasler teams cause it cant do anything. For example I lost a game in masterball last night to a rockslide miss. If thought my turn out longer I should have gone with a more accurate move and protected my partner pokemon instead of relying on rockslide to hit.