Seems to me like "shitty software" is just a moving target. All software is shitty because we can envision something better. In 10 years we'll all be complaining that Windows 20/macOS 23/iOS 21/Android {{confectionName}} is shitty, though surely it will be something that our 2018 brains would find amazing.
I'll give you one definition of shitty that particularly annoys me: does the same or less than an equivalent made 10+ years ago, while running just as fast or slower than the old one. Advances in hardware seem to be mysteriously eaten somewhere.
