Anxiety makes you second guess yourself, the opposite of flow. Flow is near autonomic responses with minimal thinking.

I've definitely noticed if I'm playing something like that saber focusing more and getting anxious about actually impairs it. Conversely, zoning out and just reacting improves performance. I'll get going so well I'll want to check my score and the moment my brain turns on I miss once, panic, and miss a bunch.

When I get anxious, the blocks seem faster. In states of flow they actually seem slower and my responses faster because I'm not thinking about them... It's a lot like ultra instinct if you're a DBZ nerd.