Hi sorry to hear about your DH sperm count and your arrogant consultant. My dh is living proof you can improve sperm count. He was classed as have a low sperm count and low motility docs said we needed ICIS. He started on a few vits and our first cycle (which feels like many moons ago) he count on the day was average what ever that means. They decided to use IVF instead of ICIS this resulted in only one embryo out of 7 which was poor quality.

result
4 cycles later and mass of vits and a total change in life style. DH count has massively improved. I think but cant really remember his last count was something like 75 million. cant remember motility. Although our last cycle failed which prob had more to do with my body than his sperm we had much better results. 11 eggs 8 fertilized 2 fab embryos (which we had never had before) the other 6 made it to day 5 but none good enough to freeze, but still good that their made it to day 5.
other tests he had on his sperm were Sperm Aneuploidy Test and Sperm DNA Fragmentation Test. both of these came back good.
So heres his vits
L-carnitine 500mg
Garlic 1000mg
Taurine 500mg
Calcium 800mg
Coenzyme q10
Folic Acid 400ug
Vit B 12 1000ug
Vit B 6 100mg
Vit E 400iu
Selenium 200ug
L-arginine 500mg
Zinc 15mg
Vit C 200mg
Triple omega 3.6.9
He also stopped smoking, drinking, drinking coffee, eats loads of fruit and veg, no hot baths
Hope this helps and good luck x x x