A coach's job is to do whatever they can to ensure that their team places as high as possible. As long as the coach stays within the rules, we should expect nothing less from coaches.
Pointing out possible infractions made by other teams, and working the officials is generally an acceptable strategy that is used by coaches at all levels. Coaches do this all the time in other high school sports. The officials in those sports have learned to deal with it, and they have the ability to penalize the coach (and the team of the coach) if the coach goes too far (technical fouls, penalties, ejection). I doubt that HS XC officials have this recourse and I doubt such rules exist in XC running, but they need to be added.
This is technically true, a coach's job is to ensure victory... when that coach is in charge of a professional team.
A high school coach's job is:
(a) to prepare top athletes for college, and
(b) to use sport as a way to further each athlete's education.
The educational lesson taught by this particular coach is to succeed by loophole rather than by doing your best. While we're at it, why don't we pass out spark notes and do our athletes' homework for them?! Then they will win in the classroom!