My problem with the whole thing is this is a game tagged mature, with a chat filter, and the ability to mute, and the ability to block. The level of aggressive about what is said in chat really doesn't match the fact that all these methods of keeping your experience minimally impacted by a dick exist.
The a chat filter is not an excuse to excessively curse statement is pretty weak, that's exactly the point. If you don't want to see it, why would you turn it off? Did you want to be offended?
You have a mute button, use it.
Why do we even have all chat? There is literally nothing you can say to the other team that cant be said post game. This exists only to draw excess toxicity.
We have a block feature, meaning you should in theory never draw that player again. Use it.
There are much bigger threats to the community and the level of toxic play that riot should be engaging instead, like the people who lose games on purpose and know because they are "active" that they will escape punishment. I've been playing since this game had a CD for sale and that problem has never stopped existing. XYZ or feed players still exist, and they still say it in chat, and they even continue to know riot wont touch them.. They're too hard to detect.
It really boils down to Riot wanting to look like they've done something so they set up an automated system to detect the simplest things possible and called it "hard work and dedication" when in truth it was only ever a cheap lazy band-aid and anyone with a brain knows it.