Better look at it from a career perspective. Is there any visibility for upper management of refactoring/rewriting this mess? For them it might look like a bunc

Better look at it from a career perspective. Is there any visibility for upper management of refactoring/rewriting this mess? For them it might look like a bunch of months without any new features. Think short-term. Your goal shouldn't be to maintain that code for a long time. Add some fancy features and present it to management. Get a promotion and switch companies.