How is it that i get banned for callin someone "trash"?
As others have pointed out to you, insulting other players is against the Code of Conduct. The fact that you reached the point of getting banned for it shows that you have a pretty bad habit of being generally toxic.
...as if the other player said nothing to me throughout the game...
Other people misbehaving does not exempt you from the rules. Other people behaving worse than you does not absolve you of breaking the rules. Other people doing literally anything does not change that you'll get punished for breaking the rules.
...but im not such a bitch that i report people over it.
Then you don't get to complain if the other party goes without punishment. Plain and simple.
You have the logs, you just ban the one who gets reported? Do you look at the whole conversation at all?
While Riot and the IFS have access to all the chat logs in a given match, when you're reported, your behavior alone is what gets evaluated when the system determines whether or not to punish you. You alone are responsible for what you say or do; other people's behavior does not matter. It's your behavior, and your punishment, not theirs.
Everyone gets flamed all the time.
Hyperbole helps no-one.
Some of us just arent such [redacted] that we report people over it.
And if you don't report people for their misbehavior, then, as I mentioned above, you have no right to complain if you get punished and they don't.
Call someone "trash" and get banned from something ive sunk money into.
Something that you've sunk money into, and that you've been warned a good few times before that you need to change your act if you don't want to lose it. That you ignored all your previous warnings is your own fault.
And before it gets said; the Code of Conduct states that your account can be terminated at any time with no refunds or liability to the account-holder.
2.2. What happens if my account is terminated? (No LoL for you.)
If your account is terminated, you’ll no longer have access to it, including any of the associated data or content (e.g., champions, skins, Riot Points, etc.). You’ll not be entitled to any refunds and we’ll have no liability to you. We also reserve the right to terminate any other accounts you may have created, as well as your access to any other Riot Services (also without any refunds or liability to you).
You understand and agree that using the Riot Services comes with the risk that your account may be terminated or suspended and that, whenever you use the Riot Services, you’ll bear this risk in mind and always conduct yourself appropriately.
Beyond that, the amount of money you've invested into the account has no bearing on whether or not you can get punished. It doesn't matter if you've spent a thousand dollars or haven't spent a single cent, if you break the rules, you can ultimately get banned.
Cant even dispute it just a box that says "i understand" lol fuckin bullshit.
You could technically appeal a punishment, but I'll tell you now, you're not going to get this punishment lifted. You broke the rules and got punished for it, and if you don't like the results, well; them's the 8r8ks.