After 3 such experiences I would be leaning on the district wildlife manager to get on the job. They have some pretty effective traps and personnel who specialize in relocating problem bears.
Old friend of mine has a small cabin near Westcliffe, CO. Bears targeted his place, practically destroyed it during several visits. Wildlife people were not responsive, so my friend and his son set up an ambush, took turns manning the rifle from dusk to dawn, took down the problem bear, towed it to the nearest public road, left it on the shoulder, called the wildlife office and left a message where they could collect their bear.
This resulted in some hostility by the wildlife people, threats of prosecution, etc. My buddy responded with a list of all of his calls and complaints over the course of a couple of months, photos of all the damages, estimates for repair costs, etc. That shut down all the official noise.
Enough is enough! Sometimes we just have to take care of the problems.
I like bears well enough, despite their horrible smell and tendencies to carry all the tics, lice, and other nasty critters everywhere they go. But when they become destructive or dangerous and the officials aren't responsive, my tolerance is exhausted.