Am I The only one that get's nuts because of UIs like this?

Length of field fitting intended content is important UX affordance.
It's still bad design tho due to all those super long fields, and the sheer amount of them.

That's my take on it anyways, im no expert tho.

Its what happened with dumping table tag for div 😬

I hate these UIs, hate it to the core.
First, it's a mean way to make users enter data.
Second, you lose focus on what is important data, and the mandatory fields just grow and grow.
Third, the user take shortcuts entering data due to the overwhelming amount of input required.
Fourth, it's 2017, by now designers and developers shouldn't keep making these. Rethink the user experience. Don't make ALL information available for edit at once.

The only thing worse than this is a flippin datagrid..

Agreed, but I love phabricator, so I let I slide.

Phabricator may be losing a lot of UI flexibility by harnessing some internal barely known PHP static renderer with stinky defaults. You can't make it dark mode at finger snap, form UX design doesn't get much attention.
If I was to decide a good frontend framework for Phabricator, I'd come up with Vuetify, but I don't feel like I'll get much support in replacing this old interface with Vue components.