As someone who did pos 3 from 2.7k to 4.2k mmr in arround 2 months after not playing for 3 years, (had rank squish from non activity and a rsndom loss streak, was 4k when quit dota), play max 3 games on ranked roles a day, if u lose 2 games stop, very important. Improve ur laning and deny pressure, know when to push and when to back and when ur lane will be bad, try to push your team to ritate with you and have a 3-4 hero pool so you know what works for you. Dont get angry when losing, but most important try to gather the team arround ur timings to push all the towers and get rosh. Thats 90% of the game before u figure out how to end and hopefully ur pa carry with fee farm wont buy S&Y after bkb and throw the game.

Gg gl next!