Why are clubs and Greek life so hard to join at UCLA?

[lkg4answers]

Linking to previous thread for reference.

I had a horrible college experience at UCLA

I am a graduating senior, and it really hurts that he worked so hard and was so lucky to get into UCLA four years ago, yet I had nothing to show for in the end. During my time here, I experienced nothing but rejection. I got rejected from every club he applied to. i got rejected from marching band. I got rejected from sports clubs. I got rejected from research opportunities. I got rejected from internships. I tried rushing three separate times and got zero bids every time. I got rejected from every friend group. I know people say rejection is normal, but it shouldn’t be normal to the point of being denied everything. All I did was classes in college because I got rejected from everything. I never made any friends or good memories here, and I have no jobs for after college