Obviously they made a bad batch, which you had the bad luck to get hold of. As Mark Twain once wrote, though, "A body should be careful to take out of an experience only the lesson that is contained in it, and no more. A cat that sits on a hot stove will never do so again -- but neither will she ever sit on a cold one, either." Your mistake is condemning the entire brand line on the basis of one incident, one time.
The vast majority of my Craftsman tools were bought pre-merger, too -- and
*none* of them "from the 60's" (when I was in grade school) -- not one of mine is older than about 1976, give or take a year or so.