Yeah its pretty silly to blame the game when your 3 Full health M4C shermans cant finish an engine damaged panther because it got abandoned twice. RnG didn't decide the game there at all.
There is a difference between taking a risk and not having it pay off and getting absolutely robbed by an entity outside of your control.
Give me a gardening break man.
Well no, the deciding factor of that game was tech choices and getting greedy on the Panther kill. As I said before, playing conservatively will prevent this sort of thing.
Three M4C Shermans isn't a very balanced force. Certainly sounds like the sort of composition that a Panther eats for breakfast, and depending on positioning (Front armour? Rear? Range etc.), penetration (Only ~40% chance to penetrate panther up close.), supporting units etc it's still a risky fight even with the overwhelming tank force. Maybe if you had a more well rounded arsenal with say, some tank destroyers and infantry based AT, it might have gone a bit better.
A t70 can kill a stug on a good day too, I'm sure the shermans had it in the bag.
But hey, I'm sure it was strictly the RNG's fault.