I think part of the issue is that Obama’s policies were often criticized not directly, but by using oddly specific made-up statistics. By arguing with those imaginary statistics (but not the implied policy criticism), it often ended up making that implied criticism point back to a point in time prior to the Obama administration, whether or not the implied criticism was ever valid in the first place.
I don’t think the veracity of the blame-assignment is relevant. Partisans are going to be partisan.