1. The cone needs to be narrowed. This is a survival sim/1st person tower defense game, not quarter slots at a casino.
1b. I think you're mixing up RPGs with Gatchas. Character abilities/perks don't affect accuracy in 7D2D. Damage dealt and effect on hit yes. Accuracy is fully dependent on rng, either where the shot lands or adjusting the cone via rolling lucky on loot.
2. Here once again all you're saying is "Get lucky.".