You're suggesting that WBR sabotaged THP. That's the kind of thing we would have heard about by now. Concerns about lack of marketing and support is exactly what prompted LP's original dispute with WBR 15 years ago. If they were willing to stand up to it then, when nobody knew if LP would be successful with MTM, they would have definitely made noise about it in 2013... by which point they were already an established legendary act.
Your last point, that OML isn't on the level of THP, is subjective. I enjoy OML as an album more than THP.
THP has some good songs, but sometimes I can't shake the feeling that the opposite of what you said is true. To me, THP feels more like the forced album, and OML is the one that feels more natural. THP happened because Mike got the itch to make a heavy record, and we know Chester was down to do something heavy, but it didn't sound like a logical progression to me. That album is like an outlier to me in some ways from their discography post-Meteora.
Even in the band members' interviews prior to each album, they seemed more excited and happy with OML to me than THP.
With all that said, this album is probably my 2nd least favorite overall. This sounds like a first step towards a new direction, but I personally wasn't a fan of bringing in outside songwriters to actually assist with lyrics. LP didn't need help with their lyrics. I understand the band wanting to work with others to get new ideas and learn from how other people go about their songwriting, but they didn't need people to actually write LP songs with them.
It's not a coincidence that SFN is one of the best songs on the album and it just so happens to be the only song written by one person.