Adobe Lightroom is the only game in town.
Hence, Adobe has zero incentive to fix large bugs. Like this apparent bug: slideshow export fails if both portrait and landscape mode slides are included. It is incredible that a corporation would let a huge bug like that just sit there, but I too cannot make an export of a slideshow that contains both portrait and landscape images. It just hangs at 1% or thereabouts.
On top of that, Adobe tries to force everyone to sign up for the Creative Suite, i.e. online software as a service with regular payments, and pay at least double what you would pay for a simple app.
Don’t be evil, anyone? Adobe does not even pretend to not want to be evil. The global dislike of corporations really is not a surprise, when you look at this.
Personally, I would not mind paying fair prices for Lightroom. Even high prices. But being manipulated and ignored at the same time by a huge corporation leaves a bad taste in my mouth.