Okay, gonna do my "I've been on the internet for 25 years so here's some sage advice" thing again.
You can report someone like that if you want, but know this: it wont do anything. Really, it wont.
This is the internet. It is like that. All the time. Everywhere. There are people... trolls, if you will... whose entire function on the Net is to get others fired up, angry, irritated, enraged, and so on. Why? Because they think it's funny, and because to them the net is "anonymous", so it's somehow okay to do it on there. There's psychological stuff behind why they do it, but we'll not get into it here.
There is one, and only one, correct answer to deal with trolling like that: Ignore them. Ignore them utterly. Give no response of any sort, and simply block them so you dont have to see their posts.
Now, if someone constantly harasses you... like, coming back again and again and again to post nasty things at you? Somehow doing it even if you've blocked them already? That's actually quite rare, but when it happens, THAT is what the report function is really for. Just for basic trolls? The mods have higher priorities than that, believe me.
Seriously, that's like one of the top rules of the Net: "Dont Feed The Trolls". When you get one coming at ya, just ignore. Just.... ignore. And be sure to block, as that makes the ignoring far easier.
They arent worth your time anyway.
Though, piece of advice #2: Stay off of social media. Seriously, just stay off of it. I guarantee you, it aint doing you any good. It never does. If you want to meet as many trolls and jerks as conceivably possible, social media is where you'll find them. Like a troll magnet.