It's possible for you to be in violation of GDPR without "thinking of user data as something for you to harvest, mine, resell and profit from".

If it's "killing a few companies" and "a startup doesn't end up seeing the light" then "GDPR is doing what I'd like it to do."

That's a pretty shitty opinion to hold.

What did those companies and startups do wrong? I'm as tired of stupid startups as the next person, but I won't cheer for their failure unless they actually do something wrong.