Certainly a decent apology, but in all honesty it is easy to say that on a forum and away from the game after being Permabanned...
It seems to me from things @lyte has said before that they won't give out second chances anymore no matter how remorseful you seem. At the end of the day you've had countless warnings and bans and it has gotten to the point Riot has seen fit to permaban you. If they give someone with that amount of warnings/bans yet another chance, how many more players are they willing to risk at your hands before you go through the Tribunal process again? They would rather lose you than the X amount of players you're toxic to.
In your own words you agree 100% with the ban. Really, you only have yourself to blame. Whether you've stumped up for Riot Points, had the account X amount of years etc. makes no difference. You played the Toxic card and fell foul of the Tribunal and Riot. At some point a line has to be drawn, a declaration that you've had X amounts of warnings and X amount of bans and that if you haven't learnt by now you never will.
I seriously doubt Riot wants you to create a second account to start playing again (they often say as much to permabanned players), but I'd put some serious thought into why you play LoL if you do create another account. After all, if you are this Toxic to the point of being permabanned - are you sure this is the right game for you?