Is There Anyway To improve The Skilled Players To Get A hard Game Or Good Teams?

Hello Everyone, i want to mention Somethings About {Normal Games only Not Ranked},

About Improving The Skilled Players Can someone explain how is the matchmaking is made? Is it like the same level skilled players or just random team?

About the Ranked Games Below Im trash player And i want to be a challenger so i just go and failing my Team. Learn the game, champion skills, get more champions, learn the basics, Learn the runes, Learn the items build, Then try your best and good luck.

Is There Anyway To improve The Match Making Can someone explain to me Why at 300 mastery score im still getting low players in team? Should WE Get Some - Kind - of A balanced teams? Anything you can do about balance Teams? Anything For the Skilled long played players?

Thank You, Best Regards.