We would hope any player would contact us or a trainer, before getting frustrated to the point of wanting to remove the game and account. There is a lot of help available for Aces High.
Yes, it is a challenging game/sim to become proficient at.
To delete the game, you can either run the uninstaller, located in the Windows control panel under "Programs and Features". Or you can run the uninstaller directly by accessing "Aces High" from the Windows "Start" menu.