facebook. I only install and use it because I download, install and play games on my android so I need the extra points/gold/credits that you get when you 'sign in with facebook' or give the game studio a 'like'. Other than that, I never use it.
Ever since it came out and to what it has become today ( i hear tik-tok is over taking it as a social media platform ?), I never used it to social network. In fact, I find it super intrusive and somewhat creepy. I absolutely do not want weirdos and toxic people to know who my close buds are or who my family members are, that is my business and nobody elses. For this reason and this reason alone, my most despised social media platform is facebook. Not because facebook itself is bad, but its a social media platform that attracts so many superficial, toxic and fake people.