If you have a low chance to hit then as per above post there's options to help. What's important is finding out why your hit chance is low. Low stats, no proficiency, poisoned status etc, bane, low ground, poor light, out of range.
If you have a high chance to hit and never hit, well that's a bug or perception.
I turn karmic dice off and it should be off by default. with an explanation then the players could choose to turn it on.
