You're not wrong, as it's your personal subjective experience, which can't be wrong.
But the fact that it pisses you off implies that you don't understand the reason behind it.
We used to have information-dense UIs before because:
- devices used to have only large screens with lower resolution.
- devices were used primarily be specialists for productivity.
Which means programs had to fit a lot of stuff in very few pixels. Nowadays, vast majority of users are casual, the people of the land, fatfingering their tiny displays. They don't need a ton of buttons and sliders. In fact, a common user would get overwhelmed by all that, even on the desktop. And while a small amount of people would benefit from a denser UI for the same casual apps, it's usually not with the effort designing and implementing them.
If we are being pedantic, Trills are a bad analogy for transsexuals. Every new Trill host is a brand new person with only the memories (with some extras) of the previous hosts. This distinction is emphasized in several episodes. So while Klingons are rather hyper-traditionalists, they can't really complain about a person having another person's memories.