So, this is about non-important things that nevertheless get you annoyed.
For me and note it veers into petty 
:
-People who stand right in front of the exit doors in public transport when there is enough space and then act surprised when you need to pass them to get out (are you dumb or just very dumb?)
-People who you have often paid something for and then make a point of wanting a small amount of money back the one time they pay something for you. Yes, it's their right, but treating them stops at that very moment.
-People who run/jog on roads instead of the sidewalk next to it. No, you're really not that fast and you're messing with traffic that has to veer out, moron.
-People who have a garden and then just put stone tiles in there. Don't have a garden then. Also, don't be surprised when your neighborhood gets heated up to very unpleasant temperatures in the summer. Also, don't be surprised if small wildlife is suffering.
-People who only listen to mainstream American music. Come on, put a little more effort into finding other things. There are literally millions of songs out there. Doesn't need to be Kpop, but don't just let charts, radio etc spoon feed you.
