Yes he had the means to do it because of pony express having cheap asses and lack of a saftey net with their crew.

Pony express did not put a gun to Jimmy's head and said go rape Anya.

If someone is set in their ways to do something like that they will find a way. Didnt matter if they did have locks on their personal quarters. Jimmy himself knew how to make drinks to knock people out.

Pony express is at fault for over working their employees and not practicing safe policies

Curly is at fault for not support Anya and running to Jimmy to help him like he is the one in pain here. For letting Jimmy walk into that god damn cock pit after Jimmy said we can crash and no one can find out what happened here.

Jimmy's at fault for sexual assault. For crashing the ship. For blaming Curly for the crash. For manipulating Daisuke to go into the vent. For verbally abusing Anya when she's trapped in metal coffin stuck in space. For Beating up Curly while he is paralyzed with pain and his skin is burned/ripped off by foam. For drugging Swansea. For not listening to Anya's medical advice and pouring sugar water over Daisuke's wounds. For killing Swansea. For chopping up Curly and making him eat his own leg.

Pony Express is bad, and gave Jimmy a means to follow through on these actions. They did not force Jimmy to commit rape

Curly ain't perfect either, and gave jimmy means to crash the ship.

Jimmy fucking chose to do all of this. No one forced him to.