Are you talking about checks we do every 6 months or the sim check to get the job?
Never really had a terrible sim, had one sim in my early days. Volcanic ash (a training exercise, not checked) I believe and the sim instructor was just shouting commands at me what to do so I basically didn’t really get to learn anything or gain any training value from it at all. He then wrote a terrible report about me to say I was unprepared and didn’t study enough.
I could have taken that on the chin, but the thing I found was after that for every subsequent sim for about 12 months I would get absolutely grilled as they’d looked at this previous guys report to say I hadn’t studied enough. But meh, never failed a sim, occasionally bugger up a maneover a little bit, but apart from that no issues.
Strangely enough the checker and I became friends years later and always went for a beer after the sim, and he never wrote me a bad report again 😂