If someone says something that bothers you, you have a few choices. You can get irritated and complain. You can let it go, ignore it, and move on, focusing on your own life. You can use it as an opportunity to learn more about others or the situation. You can use it as an opportunity to practice compassion. So can they. But you can't control them, you can only control you. When someone does something that you believe is bad or wrong or "unfair", that's on them - it's about them. It becomes about you when you let it become about you by taking it, owning it, and reacting by passing it on. It's like the story about the man who kicks the dog after a long chain of people in bad moods. If another parents wants to comment on your kid, fine. If they are commenting to your kid, that's a different story and should probably be shared with the coach (no names mentioned) as it's not going to be good for the kids or the team in general. The coach might want to address it with a gym-wide email or discussion. But as comments just between parents, you don't have to let it affect you. This is your chance to practice and demonstrate compassion, patience, and maturity. They parent(s) will get over it, the kids will move upward and onward, and in a few years (or sooner if someone repeats a level or quits) they probably won't be competing together anymore anyway.
I don't know you or your daughter, and I have no interest in stalking you to find out. Regardless and to be frank, if your kid is destined for greatness, it's a good time to start practicing being a gracious winner - which can be harder than being a gracious non-winner. Watch others who are successful at high levels and, for most, you won't see them (or their parents) venting that people think they are "too good." Comments/posts like this - regardless of the original intent - come across as humblebrags.. (technical definition being a statement intended as a boast or brag but disguised by a humble apology, phony show of humility, complaint, etc..). I'm not saying it is and I'm not saying it isn't, just that you need to remember that success in gymnastics isn't just about being good at the skills. How you, your wife, and your daughter interact with others will impact her opportunities.
If this really is a complaint because it's too frustrating to you that others aren't reacting to your kids success the way you believe is right, let it go. If it's on any level reaching for compliments or an outlet for your pride, you'll probably get a better return on investment (and have a lot more fun) with a YouTube channel or Instagram account that celebrates your kid's strengths and achievements rather than drawing attention to the weaknesses (either in compassion, tact, gymnastics skill, etc..) of others.