Bringing attention to problems is doing something. Match staff may not know better, or may just not be aware of the problems. If someone gives me a valid criticism of my ROing (or some other match staff duty I do or have done), it benefits the match for me to listen to them and not just say “fix the problem by doing the job yourself”.
On the other side, as a competitor, if I bring a problem to the attention of match staff, and they just blow me off and have your attitude about it, that doesn’t make me decide to volunteer for the match. It just makes me not want to come back to that club.
I get it, it’s not fun to volunteer and have people criticize you. I’ve been there. The culture is shifting in the wrong direction - when the org treats members like customers, it’s not surprising that they start acting that way (if I have a problem with a business I don’t offer to fix the problem for them, I’ll just take my money elsewhere).
I think the ideal scenario is competitors nicely bringing up criticisms, and match staff listening. If the shortcoming at the match is related to being short staffed, a genuine explanation and request for the competitor to join the volunteer group is usually well received in my experience.