So we’ve gone from the “eloquence of the Quran” to the family of Muhammed,im sorry I don’t see any sound arguments that prove anything.
If you don't see sound arguments proving God, his Oneness, the signs of God in the outward and inward, in the creation outwardly and in the spiritual realm of the soul, the wisdom of connecting from lowest to highest through a divine book (Nubuwa) and showing all levels of knowledge to the Nabi and him being a Messenger conveying the truth of it in the Sunnah, then of course, you can't appreciate the exalted nature of Quran.
And if you don't see the wisdom of Ulil-Amr in Surah Nisa and, you don't understand the social model of Islam, and Imamate and Islamic society, then sure, it's not proven to you.
But these arguments for Islam in the Quran, they are before the Quran, and all it takes is reasoning.
One can listen to Quran and Ahlulbayt (a) and be guided to these proofs, or one can reason and philosophize sincerely, and will reach these proofs as well.
If a person would ask "Why aren't Angels" coming down to earth instead of humans, the Quran has a whole philosophy of why humans and why the Prophets and chosen ones, been chosen and exalted above the Angels in this regard.
And the issue is delegation. Delegated to Angels, they either have to come outwardly in non-Angelic form, and confuse us, or if they are witnessed in Angelic form, not everyone is ready for that reality.
And humans delegate leadership to the likes of Trump and mischief makes in the earth, but won't give a chance to those God proves their authority and who have a divine book calling to them. This arrogance and oppression towards their followers, has always resulted in destruction of arrogant people "So wait, we too are of those who await".