He seems quite healthy and plump so I doubt this would've ever turned into a horror story, but nice pickup. Thing is, he has been eating and eating well by the looks of it so the chain stores method of give them a frozen thawed rat once a week would have likely been just fine until someone like yourself picked him up.
The problem is when a snake isn't well started or can't handle the stress of the new environment, its never malicious with the intent to make the animal suffer, the employees simply lack the knowledge, initiative and time to try and get a picky feeder to start eating. Then one of us more knowledgeable owners comes in and sees them and off goes another tirade which everyone joins in on.
I've yet to see a malnourished sickly snake in a chain store near me, albeit I don't visit them often, but from the way I see it, its an uncommon situation when a snake doesn't adjust well and then we make it a big story. Exactly like people picking out the snake stories from a bad keeper to show the world how no one should keep these dangerous snakes.
Instead of coming on the internet to complain about it why not put together a proper care pamphlet, take it in and calmly explain why what they're doing is incorrect and how they can correct it. A simple, helpful explanation of why the care is inadequate will do tenfold more than screaming judgmental accusations of how they're torturing animals.
Anyways, sorry for going off-topic, its a beautiful snake and I'm sure they'll have a great life with you![]()