I thought your 1v1 was good until you mentioned Lotto games, these aren't helping you, even if you balance it out with some strat games since we don't know what how many of those strat games you win.
Like I said, don't worry about overall stat. Some people have a very high overall stat but they only good at one template and that's all they play.
look at this player: https://www.warlight.net/Profile?p=1420802734
He has an overall stat of 57% but he's 1v1 is 13%. He only plays 5v5 with 75% luck and some very unstrategic settings. Most strategic players wouldn't know how to approach his template. It doesn't mean that he is an amazing player, it simply means that he is good at that template.
A better indication of your skill is not just your winrate but the kind of games you play and the people you play against. A variety in strategic settings and maps also helps you improve.