I can’t speak for others, but I’ve never met anyone really successful in the industry that hate their job, or were purely driven by the grind.

Every single one have been deeply passionate about their craft.

Not saying that you can’t grind your way to success - earning enough to retire at FAANG firms is possible, just by grinding. But the vast majority, even those with a grind mindset, will not be able to do that.

Many people love their job in the beginning but hate it towards the end though. The book "Showstoppers" shows some examples.