I thought anitmatter was still mostly theoretical. Apparently they claim bananas give some off in the decay of potassium. I am skeptical they have a good handle on “antimatter” however, despite scientists claiming they have all of the answers now, just as every generation of experts claimed to have all of the answers, never being true before, but it is now, got it.

thought anitmatter was still mostly theoretical

You thought wrong and that’s ok.

I am skeptical they have a good handle on “antimatter”

Which is more likely: you haven’t kept up to date on physics news, or the people who spend their lives doing physics don’t know what they’re doing? Be skeptical. But fix that by reading more. If someone is skeptical, but the answers exist and they stay skeptical, that’s just willful ignorance.

every generation of experts claimed to have all of the answers

No they haven’t. And no one is claiming that now.

This isn’t skepticism. This is “I don’t understand, I don’t want to understand, but I want to feel smart so I’m going to say they’re not smart”.

On the contrary, the universe, the state of matter, the mechanisms of astro physics, are the subjects most deserving of being skeptical of experts claiming to know things they have no way of knowing. Now you may be referring to some humble scientists, but the “exerts” absolutely do claim to know everything.