Your score being less bad is pretty irrelevant as Cho when it comes to whether you were playing well or not. Particularly because of his role and how he works. If you were a squishy carry I might be more inclined to believe you no questions asked, but yeah... just thinking about this.
Causes for high CS:
- stupidly farming when your team needs you
Causes for high K/D ratio:
- not actually playing properly as a tank-- no initiating or taking point
- not being present for teamfights/ganks when you should've been (coincides with high CS)
- running away during teamfights before you need to so your higher DPS teammates take damage prematurely and your team loses teamfights as a result
- your team gets crushed in a teamfight and you survive by merit of being ignored/having high hp
I'm not saying you necessarily were a big part of the reason your team lost but you sound a lot like a "vintage bad pub" with the way you're describing the events of the game and by what you consider to be the indicator of how well you were playing.
I would at least consider that you may have been able to play better there and try to improve what you screwed up. Obviously there are times you get a bad beat with pubs but complaining about it doesn't serve much purpose.
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I tried to have a fierce rivalry with SuperNiceDog, but he made me look worse than a GameFAQs Contest!