A lot of things are perennially unterestimated, and making it work anyway is simply an engineer's job and can be quite fun. If it literally gives you nightmares

A lot of things are perennially unterestimated, and making it work anyway is simply an engineer's job and can be quite fun. If it literally gives you nightmares, e.g. because a bad estimate gets turned into a deadline, chances are your job just sucks (and likely your company, too).