Dean in the ‘reverse crypt scene’ is very different to Cas in the original -
When Cas was beating on Dean he was really completely lacking control of his body and struggling to maintain control of his mind, what he was doing was not at all what he wanted to do, his actions were NOT HIS OWN.
Dean… was… different…
I see it as Dean being under the influence of a drug (as the Mark has been compared to all season), but despite that his actions WERE HIS OWN, at least to a larger extent than Cas’ were.
Meaning, as I understand it, there was a part of Dean that
WANTED TO PHYSICALLY HURT CAS, due to being angry at Cas for working behind his back. Which is in keeping with Dean’s character imo - he’s continually been shown to express his anger towards Sam with physical violence, for example, what with the number of punches they’ve exchanged over the course of the show when Dean was unhappy with Sam’s behaviour, or if he hasn’t physically harmed Sam himself Dean has destroyed a fair bit of near by furniture instead as a means to sate his violent urges. Ofc the Mark built on that anger and desire for violence, increasing Dean’s rage and bloodlust to far beyond the few punches he perhaps might have been satisfied with without the Mark’s influence, but as I understand it the base desire for violence very much came FROM DEAN and NOT THE MARK. Unlike with Cas, where the act of physically harming Dean came from Naomi and Cas himself had no desire/urge for it at all.
So, the Mark isn’t ‘mind-control’ as I understand it, is what I’m trying to say, I guess.
It doesn’t take responsibility away from Dean. At least not completely.