It's very hard to even get to try Campagnolo these days. It's been years since I've seen it in the wild. Almost no shops carry them and I never see anyone riding them.
But anyway it's not really a matter of me personally comparing both. Shimano is universally acknowledged to be smoother shifting.
So tell me, why would I, as a rational money spender, pay more money to "try" Campagnolo's less smooth shifting? I already know it's a worse product. Is my curiosity worth wasting thousands of dollars?
Makes no sense... which is the exact conclusion 99% of people make, which is why Campagnolo is going under.
A leads to B leads to C. It is what it is.
We (this forum not you and I) talked about this recently with bad reviews. I would say yes Shimano is more wide spread but I don't know if they are smoother than Campy.
You only know it is a worse product because you haven't tried it and don't know. You are just the same as everyone else in the industry who goes "that product sucks because someone said so once" I have a co-worker who claims to hate SRAM yet has not ridden it you are doing the same. I had similar views back in the day when I was young and didn't know much but I have evolved. I will say I might not like something on stuff I have tried or worked on significantly as I can make a more informed opinion However just saying "I haven't tried it so it has to suck" is just wrong.
When I first saw SRAM had new brakes several years ago I said they must suck but then I actually tested them and realized they were pretty good and then their new Maven brakes came out and I said I wouldn't say no to a bike with them. I am running SRAM AXS on a bike and honestly it has been a great experience and in the past my immature self would never have done that.
Some people like slamming shots of cheap whisky because they are easily available and some people want a 12 year old Bourbon neat in a Glencairn.