I don't for one minute think you weren't trained to use throttles, do steep approaches or Max perf take-offs if you were trained in the UK.
Maybe this shortfall in your abilities or experience of these techniques is down to the fact you trained at so many different places instead of getting good, continual training?
Ask anyone who flies an S76 offshore. Max perf take offs and landings etc are often the norm!! You probably won't experience it tho.