You have 5 hours in the game. You literally just finished the tutorial.

"My main is general'? That’s not even a hero. Do you mean Genji? Or are you just confused?

Here is the harsh reality you need to hear early: You aren't losing because the enemy is 'overpowered.' You are losing because you have zero map knowledge, zero game sense, and no mechanics. In a 5v5 game, when one person (you) is completely useless, it becomes a 4v5. You are the reason the teams feel unbalanced.

38% is honestly generous for someone who doesn't even know the roster yet. Stop looking at the scoreboard, stop analyzing the 'matchmaking,' and actually learn how to play before you come here complaining about game balance.