Mahabharata: probably the longest poem ever written. It's thousands of pages. Most of it has little to do with Krishna. And even the Bhagavad Gita, a very small part of it, though obviously important, is more about following the Hindu path of righteousness than about devotion to a, well actually it says nothing at all about devotion to a guru. Krishna is god.

Ramayana: I have no idea what you are talking about. That is not the Ramayana I have read. I think I own three different versions of it. And by the way, guru does not mean representative of god. And it also does not mean someone who brings you from darkness to light. The root of the word means heavy in Sanskrit, so he is the heavy guy.

Vedas: are first of all not in Sanskrit, they are spoken in Vedic, a language that is largely lost. There are 4 of them, the most important being the Rig Veda. The last time I checked, there was only one translation of this into English, by Wendy O'Flaherty. I might still have my copy. She only managed 10% of it. I can't remember anything in there about devotion and certainly nothing about gurus. The Vedic religion, the precursor of Hinduism, was focused on mysticism and ritual. The Hindu reformation mostly did away with the ritual because it apparently stressed everyone out too much. If you get the ritual wrong, all hell breaks loose. One that was still practiced fairly recently was a horse ritual where you follow a horse around for a year and do lots of sacraments. Obviously an expensive endeavor. I once watched a documentary of the last one ever performed.

A more interesting part of the Rig Veda is the description of and preparation of something called soma, which was some kind of psychedelic plant substance. One theory is that it was magic mushrooms, though this hasn't been proven.

Anyway, believe what you want, but I learned my Hinduism from some pretty smart people, some of whom were leading scholars at the time. And what you are saying doesn't make a lot of sense from a sociological point of view. Religions are a bulwark to the cultures they serve. They are like glue. Hinduism, for better or worse, is the thing that has kept Indian society together for some thousands of years. Simply put, perhaps overly simple, its function is to keep everyone in line. Questioning that status quo, that kind of subversion is what cults are for.