Unfair Harassment

So, I was playing a NORMALS, with what I presume to be three others in a group. I notice our blue has gone untouched for almost 10 minutes, so I decide I'm going to take it. That's when all hell broke loose. This started a large chain of harassment from the Jungle, Support, and Mid laner. And when I put in my two cents, they call ME toxic, and continued to harass me. After about 10 minutes of them verbally assaulting me, I decide ive had enough, and leave the game. Id rather not play a game I choose to play for fun (these three obviously had some slim lcs high hopes) all because of some people ive NEVER even met before cant just play the game for what its worth. Then when I come back, IM in trouble for leaving a game. I have to type "I agree", to no longer leaving games. Even those where you are being verbally harassed. And, the best part. I cant even report these three. There is no option to report players after your match has ended. Thanks Riot, for creating a safe haven for those who decided to harass their teammates. I understand there was a fourth person in this match as well, and me leaving the game may have impacted his experience, but I play the game for fun, and just like any other game, as soon as its no longer fun, I'm done playing. And I stopped having fun after being the subject of attack.