Chain slip causes bent derailleur The chain of my bicycle slipped of the top sprocket and cause the derailluer case and hanger to bend. Anyone experienced this?

Edit - More Info:

I crashed a couple days ago before the derailleur got bent and after the crash, I realized that when I try to shift to the big sprocket stationary ,it sometimes will slip off and goes to the back of the cassette. I thought it won't be much of a problem and told myself just to not try and shift to the largest sprocket. But during that time when I was cycling, I tried to shift to the second largest sprocket but accidentally shifted too much and I think that caused the chain to slip to the back of the cassette.I was pedaling really hard at that time and I think that bent the derailleur.

The derailleur was really badly bent since it was facing up, I had to push it back to its original place as the bike would not move. After I did that, I saw that the cage plate (if I'm not wrong) was bent towards the spokes, applying pressure on to them, and making that ting ting sound. So I used some force to try and bend it back so I could go home. Now that I'm looking at it, I saw that the cage plate was both twisted and bent and the rollers are not aligned. The chain is also not on the top roller and is laying on the the cage plate.

Edit:Changed the rear ,working fine now. Thanks for all the help!
I crashed a couple days ago before the derailleur got bent and after the crash, I realized that when I try to shift to the big sprocket stationary, it sometimes will slip off and goes to the back of the cassette:


It sounds like the derailleur was already damaged in this crash, causing the shifting to be off. Perhaps the hanger got bent, causing the cage to point inward, throwing the entire shifting alignment in the direction of the wheel hub, thereby allowing the chain to derail from the largest cog. This is a bad situation if, additionally, the derailleur makes contact with the spokes.

In this situation, the lower limit trim screw won't help, because its action plays out in the pivot mechanism above the cage.

If you're prone to damaging your derailleur, consider installing a derailleur guard.