Sounds like you messed it up, to be honest. I've had 5 model 15's, and one 715, and all have been great shooters. The rear sight on one of them did break, but it was a gun I got for $125 bucks due to it having a heavily pitted barrel. Since I had a new one, it wasn't a big deal, and I had a bunch of new sights too. Never had to do anything to swap barrels out, they hit dead center on all of them. Problems during ownership consisted of a clipped mainspring on one causing misfires, and a broken trigger spring on another. They were all bought used, so these weren't a shock..
I would take a model 15 over just about ANY other .357. They are strong as hell, accurate, and can be fixed in a couple of minutes, unlike just about any revolver out there. I've had a Python, an S&W 19, a 66, and a 28, and I would pick the DW first, with the 28 a close second.
Now if I only had the spare cash for a 44/744..