The jumbled letters is one aspect (for me the page swims making it hard to read rather than what people stereotypically think of as dyslexic reading).
It affects memory, processing speed, organisation, spatial awareness, and concentration levels among other things.
I like to think of myself as an intelligent woman but have to work extremely hard to overcome my issues. My organisationso skills I've had to work extremely hard at and put strategies in place in the workplace, my processing speed I have to explain to people I can't just read an email or report and ping a response straight back to them, my spatial awareness can be an issue when driving (I always er on caution and don't attempt to get through a gap or go for a space if I think I can't do it).
On the plus side I am extraordinarily creative as many people with dyslexia are!
Just wanted to say that there are many ways it affects people!