Those glass shower screens are only meant to swing into the bath aren’t they, not away from the bath e.g. so that the water drains into the bath not on the floor.
Sounds like you pulled it in the wrong direction and it shattered.
I had one at the last place and it could move either way . . . i was very gentle with it, because i was new to it, it didn’t seem to fight against me gently pulling it that way . . . i didn’t in anyway shape or form feel that I was doing anything in correctly, . even though I may have been?
They are hinged, so surely they can move that way a little if not only just for safety purposes.
The whole thing fell out, if the glass just shattered I could understand it, the whole thing just came off, i was bent over and just moving back straight, it all happened so quickly, the exact way it shattered are beyond me . .