Had another job interview and thinking of roping again

I've been working really hard and trying to be the best candidate. I had a good presentation and had good questions prepared for them that even they had difficulty answering because I think they were not prepared. Their questions were just random criticisms of my work they thought of while viewing my presentation. That was their "interview questions". I smiled and was nice and polite and friendly the whole time. But I feel like I won't get the job again because I believe they decided in the first 2 seconds after seeing my face and lack of confidence / alpha vibe. I think they hire based off of face and personality that's it. And looking around Reddit threads apparently every job is about "culture fit" aka being attractive and from the same socioeconomic background as them. Just having a hard time seeing what's the point in continuing to try if everything has been decided the first 8 years of my life when I was fucked over by my parents, school, etc. No matter how much I try in any field no matter how much competence or intelligence I have it all comes down to if they like you or not which is based on above mentioned factors. Just thinking maybe giving up but dunno how to live without any purpose or goals in life if I give up.