Yeah, the adoption suggestion is definitely premature. It takes awhile to figure out why there isn't any sperm and then you can look into TESE/TESA and see if you can find any. Some couples are able to do ICSI with IVF and get a baby. Some will consider donor sperm and look at it as a half adoption. You're definitely not at the end of the road in your quest to have a baby, even if it feels that way right now.
It can be so isolating. You know there is no chance of a surprise BFP like other who are dealing with normal IF. Not many can relate to what you are dealing with. I had someone once tell me that my husband just needed vitamins and acupuncture and he would get better.
Keep your chin up. The azoo group is fantastic, I don't know what I would have done without them. Just remember that as dark as it feels right now, this will get better. You will start getting answers and options.
Thinking of you.