Need help determing deinterlace solution.

[Golem]

Sample clip - https://mega.nz/file/EfMG0KKY#kpUVgn4E3-3v-Js0kHkhVguI_ztuaU-zly6cIaxS3ss

I've been using FFMPEG to attempt a progressive output of what appears to be a hard telecine source. Three utilities flag this as a BFF interlace but ffmpeg "idet" indicates only about 1% as BFF/TFF (26/4). After about 30 attempts of wildly different combinations of attempted deinterlacing, detelecining (hard & soft), yadif, fieldmatching, including 20-switch scripts the best I can do is get it reduced to 2+2 with minor ghosting.

I'm hoping someone can show me where I'm overlooking something simple.

[Sharc]

There is nothing to deinterlace. It's a pretty hopeless mess IMO. Ditch it.