Am I the only one for whom basic mathematics doesn't work in the game?
For instance, Lae'zel has a STR of 17. Plus 3 to hit and damage. Yet somehow she does less than 4 points of damage to goblins all the damn time.
All the time, really? Lie. Lae'zel is beastmode given the proper build and weapons.
In fact, having run a number of STR 16 Battlemaster's SOLO builds, I have had nothing to the degree you are asserting or describing.
Furthermore, RNG is simply that RNG, math not involved and don't take having to be a rocket scientist to understand that.
And if you running around in a fighter build with CON 10, you doing something wrong.