She had a decent home, clean clothes, beautiful skin, hair, and teeth. Looked to me like she was doing just fine.
When people talk about Luke's suffering, they're talking mostly about getting his hand cut off. But in ANH he gets assaulted by sand people, accosted by aliens at the cantina, almost drowns in the trash compactor, then watches his mentor die, and he also loses his childhood best friend in the final battle.
Then he goes on to get savagely assaulted by a wampa and almost dies in the cold, crash lands his Snowspeeder, gets his *** thoroughly kicked by Darth Vader, losing a hand in the process, as well as having everything he ever believed ripped from him when Vader tells him the truth.
What "hardships" does Rey go through? What crippling defeat does she suffer, but brushes herself off and decides to go on? Oh right...none. Cause she's perfect and never grows or changes or even has a personality.
Your argument about Rey not being the ultimate Mary Sue is a BS argument.