You really should read through the whole of this thread that I started. Nephilim and Genetics I think by the end you will be convinced that nephilim are giants. But especially notice the AIG link I included there and below; it goes through all the biblical references they definitely existed after the flood. Also maybe be more open-minded?
From the AIG article: Giants in the Bible | Answers in Genesis
Og’s bed or coffin was about 13.5 feet long and 6 feet wide.
Since gigantopithecus blackii were 10-12 feet tall, this fits.
I went down the rabbit hole and now I’m a Bigfoot believer. 
Not that they exist now but they are the same as the Nephilim back then - at least I’m 60% on it.
I checked it out. All we have are lots of teeth and a few mandibles. For many decades it was thought to be a hominin. There’s still not a lot of of reason to think it isn’t human, especially if you are YEC and the Bible refers to many extraordinarily tall giants. Is that protein work actually credible? I have my doubts.
This was a non-hyperbolic overview I appreciate. What do we actually know about gigatnopithecus?
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They had cavities
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They didn’t have incisors to tear up meat like animal carnivores do
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Mandibles do support bi-pedalism
A technical paper that was interesting. https://onlinelibrary.wiley.com/doi/full/10.1002/ajpa.23150
Native American cultures have a Cain and Abel stories and are aware of giant creatures: http://saintclaircountybigfoot.wikifoundry.com/page/Indian+Folklore+{Bigfoot%2CSasquatch}
Lots of cultures around the world have a Bigfoot myth: Why Do So Many Cultures Have a Version of Bigfoot? | Live Science Notice the legends mentioned are in East Asia and western North America specifically.
Given all the other legends discussed in my earlier post, this evidence, the Bible telling us there are giant humans, it’s at least slightly possible we’ve been looking at Nephilim teeth for a century. 
I like the idea anyway… 