Your duplicate ticket 2295566 is still active and I’ve added myself to it to track.
That tutorial you shared is talking about the hubspot dashboard and adding a partial zone to cloudflare.
That’s the issue. You added it on the partner site and added it with an incorrect ip to your cloudflare account. [1014 issues come up a lot, if you scan these posts you’ll get an idea of why that is the case and how to avoid them,
I’d remove the zone from your cloudflare account and ask hubspot to step you through their tutorial for getting set up on their dash.