I think when you date in your late teens/20's, it's a lot easier, because you are a blank slate, and you don't have any emotional baggage or children.
By the time you are mid 30's and beyond, the chances are, that you've had a few bad experiences, and you come to the dating table a bit jaded. So, it's a dating pool, of jaded men and women, who all have their guards up and a fear of getting hurt again.
But, you have to try to get beyond those initial barriers.
When DH and I met, we had both come out of bad relationships. I had been with someone for 20 years, and in the latter years, it had come to light that he had cheated with multiple women. So, you can imagine, I had enormous trust issues. DH's last 2 girlfriends had mental issues, and had behaved appallingly to him (disappearing, self harming, threatening suicide, using drugs and a lot more).
We were both totally honest and told each other everything. We never once messed one another around. That worked for us. We have been together for 9 years now, and he really is a lovely husband.
My advice would be to keep dating, and the very first time someone messes you about, dump and move on. There are lovely men out there.