You finish university at 21. So someone who is 23 and normal already has two years of work experience. What are they waiting for? They should have married after graduating, not years after. Unless of course they care more about work than marriage. And they’re fulfilling their desires in a haram way. No guy would be interested in a woman like that.
You have a very simplistic outlook towards life which tells me you are pretty young.
The process of finding a decent husband, that you have a lot in common with can be a long one. Same applies for a man. Many women are not encouraged to look for the one whilst studying, so is he just going to pop out of nowhere?
Also, more importantly you have to take into account calaf. When we will marry is written for us. You can search night and day hoping to get married at a certain age. However, if it is written that you will marry later then nothing you can do will change that.
I know a few girls that got married later. No, they were not fornicating authobillah and it wasn't a case of them not wanting to. It was a case of not finding a suitable mate and meeting someone special unexpectedly later. I've noticed in life you tend to meet great people when you least expect it.