Sperm counts are falling worldwide. Men, including Frum men, are also becoming less interested in marriage and finding a mate, as chemicals and pollution affect them too.
Men today are afraid of women, as legally all the power today is on the woman's foot, as they end up getting the children, house, car and bank account! Also the feminine mystique has largely gone from womanhood.
All this is predicted in the Tenach and Chazal.
You have to admire Haredi couples who may have zero mutual attraction, repulsion even, but who still force themselves to marry and do pru urevu, out of peer pressure and desire to perform the mitzva with mesirus nefesh, regardless.