I agree that this is a bad idea. Bus travel sucks. It has basically all of the downsides of air travel with basically none of the upsides, minus cost obviously. Without knowing what countries you’re going to be going through it’s harder to say. Bus stations in my experience can be difficult to navigate in my language, in a language I don’t know I’d be even more concerned. Usually you can eat food, but like airplanes try to be considerate about what you have. Avoid fish, common allergens, smelly food, etc.

Finally consider that over those 36 hours you’re going to have to either bring food, or buy it, you’re losing time wherever you’re transit, and are at the mercy of the bus time tables instead of waiting on a single flight