Take that as an opportunity to learn about the game, learn about the tactics, and just have fun even if you're being destroyed by the enemy. I've been recently been matched with players like this in unranked while I try to achieve the 10 win condition to play ranked. As a new player myself, I know how it feels to get owned by players who play better than you but you aren't gonna learn how to properly play the game if you just afk halfway throughout the match. To become a better player you should learn from your mistakes to find out what you did wrong and improve from that mistake.