I have the same problem, kind of, but mine more that I got exhausted from NTR, what I mean is that they way I determine good NTR game is if I'm really depressed and physically sick the next day= a good NTR game for me but it's mentally and emotional exhausting :D but that's rare with all the bad ntr games :P but I'm more of a lurker these days.
I can relate to the after-effects of a good NTR game. Though in my case rather than general depression, my overall faith in humanity drops into the red for a while afterwards, raising my bitterness towards the world, which can last for a while. Though my normal state is quite cynical and jaded to begin with. Along with that I get a pronounced hatred for the NTR guy in the game in question, being irrational furious whenever I remember what happened in the game for quite a while afterwards. I keep myself calm by imagining what I'd like to do to the guy if I had been in the protag's place. I can spend an hour coming up with the most elaborate and gruesome revenge.
For the guys in the
人生通行止め I actually decided that death was too good for them, and devised some truly horrific methods of paying them back. Stuff I dare not allude to in print for fear the police might really pay me a visit over it.
Sure, when I playing such a good NTR game it turns me on more than anything else. But after, I almost ready to do murder. If the NTR guy actually appeared before me in the flesh, violence might seriously ensue.
This isn't raging at NTR itself, but genuine hatred of the character for what he's done. Maybe it's my way of coping with the soul-crushing loss that powerful NTR inflicts, I don't know. It's just how I deal with it.
Though I don't really need a break. In fact, when it comes to non-eroge sources of NTR nothing else does it for me quite as well and I take as much as I can get. I only put off eroge due the commitment involved. Since I always try to play the games properly, trying to understand all the text and the plot without skipping, and in order to develop the suspense for NTR I need to keep going with as little interruption as possible, it can be hard to find the time and the energy for it. That's the only reason really.