Social media, and many games on your phone (and your Xbox, playstation and computer) are made, designed to be addictive.
I kept track of my behavior for a day: every time I wanted to put facebook down, something interesting popped up and I kept scrolling. This happened 14 times an hour. If you scroll for an entire hour, it'll be about once every 3 minutes. That's when your attention span drops, that's when they have to lure you back in.
Same happens with instagram and snapchat, the entire algorithm is built to let your brain fade out and then something really exciting pops up to keep you hooked.
This is built around the human survival mechanism of hunting and gathering; throughout evolution of the human brain, those little sparks that rewards give us, kept us humans going. Days without food? Well, a small cricket might do the job (reward) and our brains keep pushing us with dopamine to keep going. Slot machines, one armed bandits, money pushers are all built around this reward-brain-system. Casinos, social media and video games make good use of that too, they copied it directly. Ever wondered why there are no windows or clocks in a casino? They want to keep you from realizing how long you've been there. Clothes stores adopted this system too. Heck, even super markets do this; just look at where the candy is. It's always near the register, making use of something primal inside our brains "That was a good hunt, now I've deserved a little snack". If you ever wonder why they've put the potato chips and fizzy drinks three isles away from each other, it's the same thing.
That's why alcohol and drugs are addictive too, and why most people keep using more and more; the brain gets dulled, the rewarding feeling fades and the amounts need to be increased.
Should you quit social media? No. Because you're a young dude and you're going to want to fit in. The alternatives are weird forums that might set you on the wrong track. You want and need interaction with your peers, trust me on that one. But to realize how your brain is being tricked into a reward-addiction-spiral is important. Candy Crush and Coin Dozer are perfect examples of how something rather simple and boring can keep people addicted. Social media do that with posts. Some people on this forum are like that to me too; they comment such weird things or something offensive, and that keeps me wanting to read more, maybe come back later to see how that shitstorm turned out.
I think that a big part of quitting drugs or alcohol, or over-eating, or social media, or video games, is realizing that it's your brain is just behaving as it's designed to behave, and that these things/programs just trigger the same system we humans have always needed to survive. However, the original design was built to emotionally reward just three things: food, water and sex.
With that in the back of your mind, it's way easier to control your own behavior. Just think about it next time you find yourself scrolling through posts thinking "Meh, I kind of had enough" and then all of a sudden, something pops up that sparks your interest. Next thing you know, it's 15 minutes later.
