Adults who couldn’t get good grades, how did you survive in life? I’m struggling to make good grades and I’m worried it will affect my future.

I am a college undergrad student and this is my 3rd time starting to take classes, I’ll be 26 this year. I’m not stupid, but I’m not a smart person either, I feel like I’m somewhere in the middle. So class after class I fail because I end up not getting good grades and I feel like I’m nowhere to go and I’m worried if I’d be able to find a good paying job without finishing my degree and now I am feeling hopeless because I feel like I’m not cut out for college and my future would be messed up and I’m still financially dependent on my parents. It’s killing me because I have been in school for almost 8 years and still have no degree or any career and I’m just barely getting by. I feel so pathetic and useless. What do I do? Pros and Cons of dropping out of College? Do people drop out because of poor intelligence quotient or they only drop out because of financial constraints or lack of interest? What did you do after dropping out of college?