5/0/4

You can do all that, but still don't understand that most people play Trynd as a splitpusher, and gets very high cs that way. You should have at least 200 at that time.

25% Kill participation? Try again.

25% kill participation. 6.9 cs/min. Unknown about vision score. Try again sweetie

Nice build... Maybe it's because of that....

Your kill participation was kinda low, and you were out-golded by your Vayne, who was way more involved in getting your team kills. Dunno about your vision score, but that has a pretty profound effect on grade (easy way to get right grades: ward more). Also, your team won pretty decisively, so it takes context into account when evaluating your individual performance.