I've been living abroad for over half my life in a country where tipping is not the norm. At most you would round up. 19€ bill? Here's a 20, keep this change.
Going to the US soon to visit family and the whole idea of tipping makes me nervous. It seems there's a lot of discussion about getting rid of tipping, but I don't know how much has changed in this regard.
The system seems ridiculously unfair, and that extra expense in a country where everything is already so expensive really makes a difference.
So will AITA if I don't tip? Is it really my personal responsibility to make sure my server is paid enough?
Only tip your server at restaurants and food delivery people, anywhere else is a scam. Servers and delivery people can be legally paid way less because they're expected to live on tips, its shit but its how it works. If you don't tip them they could have basically worked for you for as little as 4$ an hour. If you're worried about amounts, just go for 15%, its the expected amount. Skip if they suck at their job though.