I disagree on both points 1) that only young, inexperienced founders have this mindset and 2) that this mindset is somehow better than other forms of inspiration/opportunity.
No amount of "being angry" equals having the skill, finesse, or revenues to see a successful exit. I recently read the avg. age of a founder who exits (acquisition or IPO) was age 45. The 20-something founders who "grind" are not more successful.
Creating a company to "prove the haters wrong" seems misguided and actually far less potent than doing it out of survival, or because there is an incredible financial opportunity in front of you.
> Is it sustainable?
An adjacent question, but the answer is an obvious "No" right? Anyway I was really getting at the question: Is this what to expect from YC founders in 2024+? Context being I've never been asked to work weekends as a normal schedule in 15+ years of working at startups in San Francisco, but recently got asked twice in a row, both from YC.