Hey Tocosrevenge,
Others here have mentioned, but the notice you received about being reported isn't an "official" warning like a chat restriction or in-game ban. It's simply a notification to you that you've been reported. Ideally, it will help you reflect on your own behavior in game and think about some ways you can adjust it.
With that said, I took a closer look at your account. The good news? The level of chat toxicity has gone down dramatically. It really shows that you're putting a lot of effort into how you act, and so far it seems to be paying off.
The bad news? Although the volume and degree of toxic chat has decreased, you sometimes still act in a way that is rude to other players. For example, in a recent game you were upset that your ADC was playing a more passive game in bot lane. After telling them to be aggressive you threatened to leave the lane if they didn't. When they didn't do what you wished you decided to roam the entire game while making passive aggressive comments about matchmaking.
NOW! Don't get me wrong here. You want to win. I like winning too. But it's always important to know your limitations as well as those of your team mates. Most importantly know that you can't control your team mates, nor can you force them to do something they don't want to do. Sometimes we get teammates that perform well, sometimes we get teammates that perform poorly. Their performance is largely on them, not you. So consistent prodding and poking through chat isn't going to get them to play better. Threats are not going to get them to play better. Passive Aggressiveness is not going to get them to play together, and giving up on a lane all together is DEF not going to get them to play better.
In times like those, give a word of advice, but if it doesn't work, then stop. Focus on your own game from that moment on. Stay positive to keep team morale up, but focus on your own play. Maybe you wish you were the ADC because you could cs better, but it doesn't matter anymore, because someone else is. So the amount of CS they get is not in your control, but your own performance is.
I know it sounds counter intuitive. "How will bad team mates improve if I don't tell them they're bad and making mistakes?" But an online game like League of Legends is a bit different then a game we play in person built around team work. I find in online games it's less about direct confrontation. That makes people defensive and resentful and much less likely to want to listen to you. Leadership in a game of random internet strangers is a bit more abstract; it's not through threats and orders but through keeping a positive tone, making your team mates WANT to play and WANT to keep trying, and ultimately guiding them to their destination with a subtle hand.
Kind of like herding a group of cats.