I encounter tons of player and most of them is toxic.
I don't know their general age but this is one for sure. If you are already mature enough to accept loss or insult you are doing a great way to enjoy the game you are playing !! Even though it is multiplayer. It not always winning it is the enjoyment of the game.
Some of I encounter I think they are children or some young boys who think winning is a requirement to enjoy the game the short answer is no. You must learn to enjoy the game even it is a loss or win.
but winning just add some flavor for the game.