I'm living it.
I started an internship at this web store made of different pieces and following no apparent rule or convention. They asked me to do this landing page, but I can't access to the development environment, nor push, create a docker, kill myself, nothing. I have to build from the DOM and write with inline style a page copied and pasted, with 300 lines of CSS already in the tpl, overwritten bootstrap 3 and two main CSS files linked. And "they don't do !important".
I wish I could say I'm learning a lot, but not. My life has become a waste of hours trying to please a company stuck and aged.