What is the thing you hate the most when working a new code base?

In the last 6 months I've worked for a new company and the CTO has this horrible habit of creating huge one liner. Like an if statement with like 7 condition all in one line or the query that are never and I mean never go to new line (something like 400 columns), it so horrible and painful to watch… Thankfully soft wrap saves my days.

what is your biggest turn off in coding?