i get people not flossing, but not brushing is actually so bad. plaque cant be removed unless you actually brush it off, and if you let it stay, your gums have a much higher chance of receding and exposing the roots of your teeth to more decay/damage + provide bacteria a place to grow
using mouthwash primarily instead of brushing is like using kitchen cleaner to deal with rotting food in your fridge. unless u take the rotting food out and throw it away no amount of kitchen cleaner is gonna make ur fridge clean.