Giving him criticism is fine, but you're being too angry about it. I can understand all too well how frustrating it is (see my own blowup, which was going too far in some places, even if I did have some valid points), but if you're going to give him constructive criticism, please do so without the insults. You're only validating the blanket he tends to throw over most all of the criticism he receives, constructive or no. If you want to prove him wrong, don't prove him right.
If I may, an absurd amount of that criticism is justified by his own actions.
Anyway, seriously, I cannot think of a way to salvage this story at this point. The main character is far, far, too SOD breaking to be believable and reeks of bad Sue. He either needs to be thrown out and a new character concept brought in and then the story worked around a far far less SOD breaking MC, or the character needs to be rewritten from the ground up. I can't offer you much advice on that sadly.
The grammar is spotty and the whole thing flows jerkily, I'd advise getting a better beta. No offense to you whoever you are, I'm sure you're trying your best but it just isn't enough. The whole thing fluctuates between slapstick and grimdark at the drop of a hat, and the torture scenes are... lets just face it they're more hilarious than actually disturbing or interesting or even believable. Their being skipped over makes the whole thing worse, the protagonist seems very REACTIVE, not PROACTIVE. The narration is also weird and jerky, with lines coming straight out of left field and making no sense; this may be a formatting thing but really all I can recommend on this one is practice. A lot. You'll hopefully get a hang of it eventually.
Speaking of out of left field things, the prologue is entirely superfluious and serves no purpose aside from padding the story length out from what I can tell.
Basically, this thing needs a LOT of TLC, dump trucks full of it.