If you are looking to find whether that is reportable by riot's standards. Yes it absolutely is(mostly because they admitted to UB).
If you want to create a conversation about people's viewpoint on when you should report something I'll give you my personal definition about when I report someone for inting (I am guessing you are considering reporting about inting, because I don't see any other valid category)
I report someone for inting when I am 100% definitely sure that person is intentionally trying to lose the game for the team, so, when that is their end goal, to lose the game.
BUT I do not report people that have done better than me individually in that game.Why? I feel like I have not earned the right to report them via my gameplay. If for example someone in my team is hard carrying while the rest are playing poorly and in the last teamfight the carry person just says "Fuck it, I am done with this game". I will not report them.
This is obviously how I personally like to handle my reports. I am not saying people should do this, or that this is right for everyone. Some people feel good reporting their teammates after a loss, makes them feel better even if they didn't perform much better.