Not sure why either ATC didn't send her off orbiting somewhere safe for a bigger window to land in or why they didn't clear off themselves. Trying to keep squeezing in between bigger traffic clearly wasn't working yet both sides carried on. Abit of get their itis on both accounts. Multiple runway changes affecting the pattern directions as well not helping, maybe leading to some level of fatigue and loss of awareness.
Pretty awful all round and imagine the Controller is sadly feeling the effects.