Yeah the catcher was barking at Cruz about the slide being really late. It ended up being bad for Cruz, but it easily could have gone the other way and injured the catcher. You could hear the catcher say "What the f*ck was that".
If you rewatch the play, Cruz was running towards the inside part of the plate despite starting outside the line. He likely did this to make the throw home from third more difficult but the catcher wasn't blocking the outside edge of the plate. Cruz could have easily stayed outside and slipped a hand in and this all would have been avoided.