I'm a front-end dev at a well known US company and I keep finding other devs using every possible trick they can to make their code "re-usable" and "robust" when in fact it's impossible to read, difficult to modify, totally uncommented, and many times longer than I would think necessary.

Other seniors tell me the comments aren't needed if I'm good at reading code. It takes me a lot of time to make changes to their code and it's very discouraging sometimes.