>>40127058You play by worst and best case scenario. What are your options based on what you opponent has done and what they can possibly do. If they're scarfed, what's the worst case scenario if you don't switch? What's the worst case scenario if you do switch?
If they're not scarfed, what's the worst case scenario if you switch thinking they are scarfed, what's the worst case scenario if you don't? Then you have to think about why would that pokemon be sent in. Does them having scarf make a difference? Are they trying to bait you into switching, or bait you into staying?
I don't even fucking play competitive, but this is like, baseline level thinking you need to have if you want to be good. Learn to think critically before you say why something is shit.