Should my account be banned?

Well. I'm not going to try to make up some sob story, this is not an attack on Riot, I'm simply curious if anyone else has thoughts on my situation. My account was permanently suspended over the summer. I know this post is months late, but I assumed there was no point in fighting anymore.

I was on vacation with my family, so off of my main computer, and on my laptop. I didn't play league much, I can't remember if I actually played at all. But when I tried to I found my account to be banned. Now this doesn't have anything to do with my location/machine change. I was informed when asking that my account was banned due to the use of scripts. I don't use any, so I was immediately infuriated and confused. Upon looking at my match history I had found plenty of matches as champions I don't play, and games I don't recall playing. The epiphany then hit me, though I didn't want to accept it.

One of my friends, who clearly isn't a friend anymore, shares my home computer with my during the summer because we hung out so much. And long story short, I have a notepad file with all my passwords (making it easy to play on my account) and I found a scripting program hidden on my computer when I got home, which matched up with my ban, and with the matches as champions completely out of my pool. At first he wouldnt admit to such a thing. So I knew what was happening now, I told Riot immediately. I tried to make my point clear multiple times but Riot would simply respond by telling me account sharing is against the ToS. I explained that my friend using my account was completely without my knowledge, and not allowed by me, same response. My friend eventually admitted that he was playing on my account as he simply wanted to "rank me up" and that he "didn't think I'd get banned", good friend!

So I'm banned, that's it. I think I may have spoken to Riot for up to two months until I gave up. My personal argument is that it shouldn't be considered account sharing when it was against my consent, if its not considered account sharing when someone's account is compromised via malware and used without their consent. You can say its my fault for having my passwords readily available on my computer, and I don't disagree with that statement. But I believe its just as much someones fault if they download malware, and don't have the program(s) to remove it before playing league if they get their account stolen.

And yes, I'm sad, and yes, I want my account back. I've spent tens of thousands of hours playing, leveling champions and masteries and grinding IP, as well as spending near a hundred dollars on skins and other cosmetics. All of this taken away in one message, completely unexpected. I don't expect to get my account back either, I simply want my voice to be heard, even if three people read this. Thanks for your time.

TL;DR.

I believe Riot will recover and excuse bans on accounts that have been compromised and used without consent from the owner by means of malware. So I'm simply curious how that's different than a friend using my account without consent.