These are great points, and it is coming in much clearer to me how the belief system of Hinduism (while it has some nice attributes) it still lacks perfection. I don’t have a ton to say in regards to all of this, but I do have some brief thoughts about each paragraph.
To begin with, in the first paragraph, if the Upanishads are not divinely revealed (but they pertain to your eternal soul) I don’t think they should be really considered. While humans are more than capable of writing self help books and incredible literature that can help make the present worldly life a little easier (such as books about organization methods or body image or coping with ocd), we should probably leave our eternal souls in the hands of God. We should only refer to books that are claimed to be divinely inspired for something that is so serious as our eternal beings. I know this may sound harsh, but we should not play with this stuff. Secondly, I think your concept of the metanarrative is so important! That over arching flow doesn’t seem very strong in Hinduism unless they reject/reinterpret certain scriptures which should be a red flag.
In your second paragraph, the concept of “perception” of God doesn’t seem like a strong one from this particular guru you mentioned. I don’t mean to slander Hinduism, but perception does not change the nature of something. For example, if a man sees a dollop of whipped cream on his chin then he goes to eat it, but the moment it touches his tongue he realizes, “Oh no! It was actually shaving cream, yuck!” It’s not as though that dollop miraculously changed, it was always shaving cream from the very beginning. Furthermore, Brahman must not care much for self identity. I would personally be infuriated if someone identified me as a goat or a robot or even as celebrity. I would say, that is NOT ME. Which is something I think is good about Christianity. A truly divine being would not share that holiness with anything else, and would not allow their name to be slandered for something of a lesser being.
Finally, in your last paragraph I love what you said about God not conforming to us. When God revealed himself in the OT people were terrified because he was so powerful. It can be argued that Jesus coming as a human was somewhat conformity because we likely wouldn’t have gotten the message if God didn’t send a human. But all the same, Jesus was was not what the jews wanted originally. They wanted world peace immediately and a mighty king. God is doing God’s plan, not people’s plan. The Hindu avatars seem to be like a “pleading god.” It makes me think of a teacher with poor classroom management skills. The teacher tries to appeal to the class by being what the students want thus forfeiting her authority and giving the class control rather than saying, “Nope, I’m the boss.” And finally, only appealing to one manifestation of God - such as what you mentioned in regards to “attracting people the Ultimate One” sounds very dangerous. God gave us intelligence, we should not worship intelligence. God gave us bodies, freewill, entertainment, prosperity, peace. We should not worship these things. We are to be thankful for them, but never devote ourselves to them to the extent we devote ourselves to God. That’s the very definition of an idol.
Well, I said I didn’t have much to say, but that was an understatement! I’ll leave it at this for now. Continued thanks for this helpful conversation