It seems that Rey had more plot armor than God himself...

Ben can rag doll multiple Jedi, take on 3 at the same time in lightsaber combat and shatter the entrance to a huge temple with the force all while still being on the light...

https://imgur.com/a/hYBRKPE

If you refer to their TFA fight, he was injuried and emotionaly hindered. But i agree that Rey is a mary sue.

He bested 3 Jedi students, whose skills are dubious at best. They have no noteworthy feats/accolades to their name.

It was a good TK feat, though.

Rey can bend reality to her will. When she experiences a "loss," she can use it to her advantage. Examples including her capture in TFA leading to the destruction of Starkiller Base and her ability to kill Leia at will so Ben would feel it and she could stab him.

Rey Plotpatine is potent. Don't mock her.