Teleporting Spiders Can't Be Working Correctly

I've now died three times in Maps I heavily invested in to teleporting spiders who as soon as they get on the screen, before I can even press a button, teleport onto me in mob, stun-lock me and kill me. Is this supposed to be like that? It's so frustrating. I refuse to quit, but it's these small things that feel so unfair in an already difficult game that makes me want to quit. I mean, think about how it feels for a new player to finally feel like they're getting the hang of things, invest in a map, and then insta-die on essentially a fluke/bad luck. Three times! Please fix this. Please, please fix this.