Thanks Jerry,
When you let the clutch out and feel like you're on glare ice, you definitely know there's something wrong.
I hope there's no offense, but your definition of "proper" and mine seem to differ a bit. The crimped part of the fitting no longer exists. It's in the garbage. Evidently it wasn't crimped at too high of pressure, or it wouldn't have pulled out. Double clamped on a 2 inch ribbed (for her pleasure...

) nipple will never come off at what, 40-50 psi?
My guess would be the fitting will outlast the life of the hose and cooler.
I've clamped high pressure hydraulics on logging equipment (1000+ psi) and ran it for several days before I could get one fabbed up, or ordered from the nearest town.
Anyhoo....all's well that ends well. I'm not recommending this method. Just documenting it.
It was a no brainer for me. 10 minutes of wheel work, or mess with a clam.
I'll add a pic of the finished product.