I have not read the whole thread - but a tactic my father used 75 years ago (and which I've borrowed) is to put circuits and landings to the side for a while, instead go out to the practice area and do some slow flight practice. Gentle handling skills down in the 1.1 to 1.3 Vso range; No rush, make speed changes slowly. Linger at 1.3 Vso for a good 5 minutes at a time, gentle turns, get really comfortable in this regime.
Then come back into the circuit and see if you can apply these skills in the approach & landing phase. All the advice in earlier posts is still good, but now you have a broader skill set.
