Dude, if without a degree you would be working at fast food, then your degree is shit. I'm sorry, but if a guy that is supposed to work in a fast food is now working in a "scientific" job because of a degree, i bet all my money that he isn't contributing. Just think with me, I do not mean to be mean or anything, but do you really think a guy with 90 IQ will be capable of doing research, or running a big company?
When you say you would be working at fast food without your edu you are just grasping the thought that you did "the right thing"
So, about marriage, you do realize not all girls are like the description you made, right? Not all women fuck chads their whole youth and then go crying for a beta male cuck to be the provider, right? It's simple, when you are knowing a girl, go and ask her "so how were your previous relationships?", if she tries to hide it, or if she had like 10 partners before, you just tell her the truth and move on. It's not hard, man
I've heard stefan tell girls to hurry up because they are in their late twenties too, but guess what? You don't have to have that girl. You can go for a younger and fresh woman. I wouldn't have a problem to marry a girl on her late twenties, as long as she realized what she did, and I saw that she would be a great and moral mom. BUT, she have to deeply internalize the things she did, not the "I regret sleeping a lot and now I look for a nice guy" type of thing