Riot can I get some help... please.

So I keep getting chat restricts and I got a 14 day ban about two months ago and I really want to change and I just need some help/clarification. First of all I know I can be a complete asshole sometimes but I'd say I'm very nice at least 50% of the time and I'm not overly toxic about another 35% of the time. The other 15% of the time I usually am toxic but I really don't want to do. I feel like I don't usually "start" things and often people are just overly sensitive to ANY form of criticism, good, bad, or indifferent.

So the first thing I want to know is do you take into account any/all good behavior? Do you look at a different amount of games? Do you look at any sort of game patterns or do you just auto look at only the bad games and judge people based off that? Also, I am sure I am on your shit list and I deserve that, I understand, but is there a way to get OFF that list? If I had a large majority of games in a row where I wasn't being toxic in any form do you reset punishment or am I forever sentenced to if I have a few bad games in a month I'm auto blacklist for punishment?

I mean you say you understand everyone has a bad day, but I feel like I get judge for my poor behavior and I get nothing for good behavior.

Let me put it like this, I have played "currently" 3 games today, the first game my support blitz said at the start of the game "Congrats, you have been randomly selected for a FREE loss, goodbye" and afked, then left 8 mins in, then came back 30 mins later and intentionally fed until we lost. I am the only person on my team that DIDN'T react by cussing the guy out, I am sure he got 8 reports and I got honored by two of my opponents. Then I had a second game where I had a team of three feeders, including my support, I was aggravated from my last game but I didn't say anything really... finally I had a third game and even though we were winning I was constantly getting ganked and I had enough so I complained to my jungle. Now, my reaction in the third game was poor but my reaction to the first two games was fine/great but I am sure if you saw my reaction and ONLY looked at my third game you'd say wow this guy needs a chat restriction. I just don't see that as fair....

TL:DR I'm just curious first, HOW to change my behavior, second if I do change my behavior do I ever get off Riots blacklist...

Anyways, I honestly would like to change and I'd appreciate SOME feedback. Thanks...