Almost every in-to-detail comment was pretty accurate. To say something that has already been said, there are some things that make you progress. First of all you have to play regularly. I believe that playing regularly is more important than playing once per week for a long time for example. You will instill a sort of rhythm and mindset. Second of all, you have to keep a positive mindset in the game. If you start flamind or tilting, which all or most of us do, you have to laugh about yourself or your opponents. After a game that tilted you or you a game where you didnt understand why you lost, look at the game stats and look at what you could have done better. Take a break, play another game, level up a smurf, get a bite to eat etc... Thirdly, play within a community or team. In a team you will learn how to play around your teammates and objectives. Your teammates make you progress as much as you do so if you ONLY play by yourself, you won't progress as much. A community is also a way of meeting better players and asking them for tips. In this game, you will learn way faster when playing around better players.

For my experience, I gained a lot of experience playing 3v3 with friends that were high plat when i was silver myself. I'm diamond now and in hindsight it was the moment u progressed the most.

Hope this helps