Ughhh, same. That's a big no-no. Aftercare is super duper important, regardless of whether a scene is successful or not. Still, I don't believe the seme is behind the pic/collar or is trying to manipulate the uke. Fingers crossed he's just a really taciturn dude and he's not a psycho.
I was really hoping it'd be like not realistic but like a healthy bdsm / master puppy/slave relationship when I first read it but it just seems like.... so gross... like he says no once and he's like WELL GUESS WE AINT IN A RELATIONSHIP ANYMORE and I was like, bitch wtf.
Like I'm hoping the reason that everyone is getting creepy vibes is because the author isn't experienced with bdsm relationships, not you know, he's manipulating him to be dependent on him forcefully.
I was like yes yes yes he's being a good dom, and then he left him and I was like well damn