I know you want your kids to be superstars at the sport they are playing, but don’t push them. Encourage them to want to get better. One day it will “click for them”. They will figure out how their body works at whatever sport they are playing. The whole point is to have fun. If you are trying to validate yourself via your child’s sports performance then you are doing it wrong.
Don’t compare your kids to other kids. You don’t know what those parents are doing to their kids to get them to that level. You don’t want the kids to hate you or the sport they are playing later on. Set aside your disappointment because you don’t need to live through them. Focus on your happiness and encourage your kids to do what they enjoy.