What you don’t get is:
Given the same conditions, some people have more obstacles put in their way than others.
Saying „I can look after myself“ from a position of privilege is easy.
But taking care of yourself AND removing the obstacles for others so they have the same chance to succeed like you is hard.
And yes: it can make you miserable. Especially when egoistic people keep adding those obstacles again.
Let me summerize your answer:
„Fuck anyone but me.“
Congratz, you’re the perfect example of a centrist 👍
Leftist: „I‘m miserable, because minorities are treated like shit, we still don’t have universal healthcare and we are at the brink of a fascist takeover.“
MAGA: „I‘m miserable because queer people exist, black people exist, literally anyone that is different from me exists.“
You (very intelligent): I can’t see any difference between you two.
Extreme politicians having more leverage, in situations where the lead of the majoritiy party is very thin, is actually very common in most democracies.
The specific stupidity of the American democracy is the „winner takes it all“ rule which leads to a two party system.