Please note people have been trying to assist when you asked a question. By not answering appropriate questions to clarify how you got into the situation you did and becoming aggressive to boot, you are really not helping your own cause.
Actually that means it is the highest it can fly under specific, standard conditions while being piloted competently in accordance with best practices. Quite frankly, if you stalled the aircraft while climbing, then you don’t know how to fly it competently.
If you consider knowing what conditions are relative to ISA and climbing at the appropriate speed with the aircraft leaned properly to be going through “gymnastic hoops”, you clearly do not understand the relevant concepts of flying.
And BTW, my questions come from real life flying background, not simming. The items I asked about are common knowledge for all private pilots, never mind commercial or ALTP’s. The reason I asked them is, because I do not own the Carenado Seminole, the answers to these questions would be an indication of whether the aircraft model is incorrect or whether incorrect pilot technique could not be the reason. Because yes, in real life and in the sim, aircraft sometimes do not meet the manufacturer’s specifications for a number of reasons. And secretfarmerGal’s somewhat tongue in cheek question re oxygen is also a clue as to how Seminoles are used in real life.
Good luck getting answers to your questions that you like.