What beers have you had in the distant past that were good; but the accountants/CEOs got a hold of it?
Killian's Irish Red for me - I know the recipe has changed. It used to be good, now it is colored BMC.
I am sure with you on this. It was actually a
very good beer when it was first introduced years ago, when it was marketed as an ALE and tasted like one. A very good one, too.
I think it managed to go two or three years before they started messing with it, going through reformulations and rebranding as a lager.
And it suffered as a result. Too bad....
Dammit, Coors ALMOST got it right.

The biggest "used to be good" for me is (as many here already know) is Ballantine XXX Ale.
It had real character, unlike the current imposter bearing the name.
It's too sad to even talk about anymore...