why keeping only few close friends with many different traits is better than having similar traits.

I have many kinds of friends and contacts but when it comes being close friends, I would set a big line where it pisses people of. I have two close friends that were in same class as I am and two more at different school. One thing I noticed in the school I'd attended, big friend groups usually have more copy and paste traits than small friend groups i've met. No hate but I have hangout with them before and it's super boring like what are these big ass amount of people for? I'm a transparent person at school like all of my close friends would know everything about me but when these 'friends' wanna know me, I came to a point to not talk to them or better more just straight up not appear in same scene as they were. Not being arrogant but these 'friends' were same people that falsely accuse me of many stuffs and hating on me on my first day at that school for no reason. yk what's pisses me off? the way these people personality are similar, 'rempit', two faced and with most common knowledge in existent that makes your history teacher more interesting. Like even if you wanna hate, make yourself more entertaining for me to humor.