why is he so obsessed with Warnock that he’s prepared to make rubbish up?
No idea, I liked Warnock, but there's no need to try and portray his time here as better than it was, it's disingenuous.
Ignoring the different starting points, you can at least try and spin it as similar with their first 46 games.
Warnock managed 12 points in 8 in 2019/20, then 56 points in the next 38 going in to 2020/21, so that's 68 points compared to Karanka's 72 points in his first 46.
Not identical, but not too far apart.
Obviously Warnock's results then nosedived, and it led to him getting sacked.
Karanka's results only improved and we ended up getting promoted.