If a project's structure is shit, well of course, let's continue using it because "it is known". Doing it any other way "will add complexity".

That I wasted three days making my working code adhere to the clusterfuck of a structure, nevermind that. Let's continue. And yes, colleagues do agree that the structure is shit, though let's improve it ... later.

Or in other words: Suck it up, we always have done it this way. Fuck you and your ill-advised attempts of trying to improve it.