Suicide feels like pressing quit on a game you've always sucked at. Why am I not allowed to just quit?

I have been struggling with depression ever since I was 12 or 13 maybe. Have been passively suicidal ever since. Am 23 now. I feel like even though things have gotten better, I still feel the same.

I don't understand why people around me, people in general I suppose, think it's so bad to commit suicide. Imagine a game you hate playing, and are bad at playing. Imagine you're forced to play it day-in day-out. Yes there's a prize from time to time, the chance to win the grand prize (cope well with mental illness and pitfalls and live a fulfilling idealised-self life).

But I struggle with daily tasks, which is a problem since I live alone, living with parents would be worse. I have wonderful friends, fulfilling hobbies, am passionate about making the world a better place, doing okay career-wise.
But I still struggle, especially around some times in period cycles. I struggle with failures, keeping myself motivated. I was in love once, though I wasn't able to make it last due to my maladaptive habits, but even then it wasn't easy.

The point is I struggle with every part of life, and after all these years still struggle even though I have fulfilling moments. I just don't have the energy to live on, face obstacles, grow as a person. I tried my best. I am not actively suicidal since I can't imagine the pain that'd inflict on my loved ones. Still, I wish I had the option of doing it.

Not in a sad way, just in the relief of putting down a game, pressing 'quit' because you know you tried your best the longest you could.