Extra curriculars and hobbies are not supposed to be undertaken for the sole purpose of excelling to win trophies, medals, and certificates.
Are you particularly talented OP? What is it you excel in, that you have won trophies for? Or perhaps the apple doesn't fall far from the tree?
You're putting an awful lot of pressure on these kids to find a talent and excel at it. Why can't they do it just to enjoy it, enjoy life, and progress at their own pace, rather than for a particular outcome?
Mine was horse riding. I never stuck at anything else. I found horse riding as a young teenager (or, more the case that's when my parents could afford the weekly lessons). I was disliked and bullied by my original instructors, and they were harsh and unfair to me. I was made to feel I was utterly crap at it and just 'couldn't get it'. I worked at the yard to earn extra lessons for months, and only ever received one lesson in return. I was bullied and ostracised by the other kids, as well as the adults running the yard. As a result my lessons were repetitive and I was only given the chance to even jump, when I eventually moved to a different school. I never competed firstly because I never had a horse, and secondly wouldn't have had the confidence to anyway. Eventually I fell out of it, and always missed it and longed to return to it.
After a ten year break I very anxiously went for a lesson at a local school in a completely different area, from the strong encouragement of my other half. I told the instructor it'd been quite a while since I'd been riding. When she asked, and I told her it had been ten years since I'd even touched a horse, she genuinely couldn't believe it. She actually stopped another instructor who was in the middle of teaching, to show them my riding, exclaiming 'This woman hasn't been riding in 10 years, can you believe it?!'. She told me I had a lovely seat, and was a better rider than some of the folks who had been riding with them for years. I quickly went on to find a share horse and had the time of my life with it.
The point I'm making is, some of us just don't fit in, either with other kids, or adults, as children. We are unnoticed. But when you give a child a hobby, you often set them for life with finding enjoyment, joy and pleasure with a skill and a passion, for life. It's so not about the trophies and progression marked on paper. Those instructors pushing me extra hard because of blatant dislike, actually made me such a good rider I could pop on a horse after 10 years away, ride well, and even jump, like I'd only been away for months. There are many who show, win ribbons and compete who couldn't (and haven't) been able to do the same after even a year or two away.
I'm really grateful that on top of the bullying from others, my parents weren't expecting me to 'achieve' something other than enjoyment and simply gave me something to find some joy in, with no other expectations to 'perform'. That opportunity really gave me something for life.
Please rethink your attitude to your kids. You can attempt to hide it all you want. Your disappointment in them will not go unnoticed by them.