I understand your frustration, but your response to the situation seems very negative. It is probably worth bearing in mind why it is that things are in short supply, and that while we are putting up with a minor inconvenience, people in Ukraine are fighting for their lives and liberties. The shortage doesn't just apply to caps, but for the same reason it applies to full-bore primers too, as ammunition manufacturers are going flat-out to supply a country at war. This is not a uniquely muzzle-loading problem.I bought a cap and ball revolver two months ago and have fired it a total of seven times. As in seven shots. The problem: No available percussion caps. None to be found. Anywhere. Admittedly, there are those online sites where you supposedly can get them with a minimum order of $150 or $200. I have tried making my own caps, watching videos and working tirelessly. The result is hit and miss. Mostly miss. Even those well-meaning video hosts who work out different approaches to DIY caps seem to have limited success and also seem to have a stock of the real stuff to use when they need it. I have not actually seen a commercially produced cap in person--just in the online ads. Sites and stores selling percussion arms should have a sign saying: Don't plan on shooting this weapon. This is not the time to get into muzzleloading. Those already enjoying the sport apparently have a supply of percussion caps available. Those just getting started? Good luck. Hang the gun on the wall. Just don't plan on shooting it.
That said, some suppliers here in the UK are now offering supplies of no.11 caps, coming from the USA, I believe, so they can be obtained if you look around. Doubtless they will cost more, though. It is no good being bitter towards those who came to the sport before you did. We are all in the same situation.