By failure I mean parts breakage or malfunction that renders the gun unusable without a trip to the gunsmith or factory. Jams and misfires are not a big deal as they are going to happen and are easily remedied on the spot.
Firearms are mechanical devices. They break. They require periodic maintenance. And... they're designed for a certain type of use.
Do you ask the same of your vehicles, home, clothing, and electronics?
I want a TV that will run continuously for 1.3 million hours, without dimming more than 1%.
I want a truck that will run for 100,000 miles, without requiring any maintenance. Oh... and I don't want to have to put gas in it.
I want clothing that never has to be washed, and will last the rest of my life.
I want a house that never needs repairs, cleans itself, mows its own lawn, and has light bulbs that will not burn out for 600 million hours.
It is unfortunate that the Bearcat broke so early, but it would have happened eventually. Now, you know the breakage is out of the way, and it should run for 50k, without an issue.
Expecting your Black Widow to hit 1,000+ rounds without an issue is completely ludicrous. That revolver was designed to be a novelty, that fires about 50 rounds in the first 2 years, then is forgotten until your death. They aren't meant to be used for daily practice.
The Walther? Well, it really sucks, but that's just Walther. They've been letting QC drop, and are only slightly better than Taurus now.
I'm sorry that you've had such trouble, but your expectations were too high, I believe.
As for something with longevity...
My Buckmark Standard exceeded 100,000 rounds without suffering a failure. I had to replace several recoil buffers along the way, and the springs were completely worn out, but it made it. It is a great pistol, but that is FAR better than normal (or expected). I might as well consider myself the luckiest man in the world, for the performance I got out of that mechanical device.
On the flip side... my Ruger P95 broke the recoil spring retaining clip within the first 300 rounds. I don't hold it against the firearm. It's a mechanical device. Things break. I spent a whopping $0.15 on a Ruger replacement, and was back in business. (Though most people would have taken it to a gunsmith, since the pistol was locked up, solid, when it broke.)