It's the fact that the idiots at Microsoft keep changing it on each version. Instead of improving upon it, they completely change it.
On top of that, they make their best effort to prevent you from using the old user interface which you perhaps loved. The way they feel that they must dictate what colors, what size buttons etc. that their users (customers) "should like", shows their arrogance.
When you bring something new to the table every damn time, there is not much chance of incremental improvements.
Instead of slowly refining something into a beautiful gem, they keep churning out shit in a haste.
