What are some of the most common red flags you've come across either on a candidate's resume or initial interview that you'd advise future revenue operations managers to avoid?

The only universal red flag that I experience in initial interviews is when a candidate cannot provide a concrete example for a universal experience (ie telling someone "no", managing conflicting priorities, asking someone to clarify a request).

If an interviewee has been fairly general in their answers and then responds, "I can't think of one," when asked for an example of how they've handled one of these universal experiences, that's a big red flag. It indicates to me that either a) they're not going to do well in the role because they're avoidant or b) their language proficiency (if they are interviewing in a non-native language) is not strong.