Hiring is the most undervalued thing a founder does. Everything else comes from it.
A lot of founders treat hiring like an interruption, something to get through so they can get back to the real work. The real work being the product, the customers, the fundraising. Hiring is the thing in between.
I think it's the other way around. The product is only as good as the team building it. The customers are only as happy as the product. The money is only as good as everything underneath it. The team is the thing that makes the rest of it work.
The thing I keep coming back to is how much you can tell from the first conversation. Whatever you notice in someone the first time you meet them is usually who they are. The things you tell yourself you'll fix don't usually get fixed. They just get louder.
The other one: people are best at interviewing when they're trying to get the job. Six weeks in is when you actually find out who someone is. By then you've already made the bet, and undoing it is way more expensive than slowing the call down would have been.
A better process doesn't really solve this. More questions, more take-homes, more references. What actually helps is being honest with yourself about the gut feeling you had after the first conversation, and not talking yourself out of it because the CV looks good or you need the role filled.
Excitement is a useful signal. Talking yourself into someone is usually a sign you've already got your answer.