Which came first? Black holes or stars suggested to eventually make black holes?
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It has been suggested that micro BH's may have been created at the BB, but ind any event, even if true, such BH's would probably evaporate via Hawking radiation before they could grow any larger.
Other then that, stars obviously were formed before BH's.
The first Generation of stars were certainly Pop 3 as inferred logically by the standard cosmological picture.
These were huge in comparison to what we see today and almost metal free.
They lived short lives [in the region of 10's of millions of years] and then went supernova spewing heavier elements into the Universe.
Some left behind Neutron stars/Pulsars, others left behind BH's.
These BH's logically then would have formed the nucleus of our first galaxies, drawing in debris from the first supernovas from the Universe around them and growing to become our first SMBH's.
PS: NASA’s Chandra X-ray Observatory has confirmed the presence of BH's accumulating mass, at the center of many distant galaxies, and supporting the current accepted theory of galactic formation and SMBH's.
You seem to be having great difficulty in accepting this standard cosmological picture, and yet offer no evidence to support your own hypothesis.