I would like to share something that may help, hopefully. I think everyone with struggles should take a strong lesson from this story and take encouragement.
Years ago in yeshiva a friend and I were approached by another bochur who, externally had health problems, looked a little mentally undeveloped, but who in fact was quite brilliant, you could ask him a tosfos at random and he'd have answers right there, even if his speech was a little slurred.
For some reason he decided to confide in us and he admitted that he had little or no taavah in s-x, and in fact could not get an er-ction, even if he tried. He was worried about his future and if would be able to get married and have children.
Needless to say, we were encouraging him as best as possible but what could we really tell him. Things would improve later ? he was already 20 years old at the time !!
Years later going through my own agonies with the issues and struggles of P & M and guilt even while trying to keep to a holy life, i remember praying to Hashem to make me like that bochur who had no taavah in that inyan, who did not have to suffer and struggle as I did.
But really think about it !!! Do i really want to be impotent ?!!
Do we not all want one day to have kids. If I had had my wish, I would not have the wonderful beautiful children my wife and I have today. Would I give that up just so that i would have an easy time and not struggle with the Yetzer Horah?
In fact, having the taavha and struggling is a small price to pay for the wonderful ability to be fruitful and bring children into the world, and for the ability to be healthily unified with ones wife and partner.
Looking back I am thankful Hashem did not grant my wish.
better to have it and struggle than to not have it at all and miss out on life....