I didn't sign up for this! - A fancy way of saying you're getting the worst deal ever and

A fancy way of saying you're getting the worst deal ever and you're not happy about it.

'I didn't sign up for this!' he said after paying $100 for a single slice of pizza.

'I didn't sign up for this!' she texted her brother after he asked her to babysit five kids.

'I didn't sign up for this!' he yelled when his job turned into a 24/7 circus.