He’s actually not wrong. Startups are brutal, you have to literally take in the whole world with as little as possible.
Once you carve out your niche, then you can relax a bit. But before that you are in a race with an unknown number and quality of competitors. You can’t afford to have a good work-life balance.
So; the candidate did tank their chances by mentioning they wanted better work-life balance. You don’t apply to startups if that’s what you want. Look more towards established banks and the like.
But the dude in the post yapping about loving 80hr weeks is clearly deranged (or trying to impress some VCs)