Luck of the dice. I don't think IC actually hates us that bad - it's just easy to blame it. Knowing nothing of programming, I can't really tell what they use to produce semi-random numbers (because I'm pretty sure almost no RNG is truly random), so I don't know how good or bad it is.
There's also the fact that kobolds are immensely annoying due to their minor-action shifts, especially when they come in zerg rushes. Due to the near-constant flanking, you can pretty much always count their to-hit as two higher, and since you can be nearly sure to take OAs whenever you move without shifting or sliding, as well as them having a massive action economy advantage, the damage adds up, even from minions.