Haven't you heard of the new magic word HTML5? Yeah, whenever you say that Flash have no real replacement people will shout at you - HTML5! Of course, if those people actually bothered to read what HTML5 is, and if they would only know what Flash is, they'd keep their mouth shut. But, since the internet is populated by parrots, HTML5 is the word we'll hear in much greater occurrence in the future. Ignorance, truly is bliss!
Of course, the mere facts that HTML5 won't be fully implemented for years to come, that JavaScript is stuck with ECMAScript consortium not being able to make a decision for years and thus making it still a prototype based language with useless JIT execution, that every browser differently implements DOM and CSS, that there is no strict markup (XHTML tried that, and failed), that even the fastest JSVMs cannot beat, or in some cases come even close to AVM2 in almost all programming tasks, that no self-respecting developer will develop complex things in a non-strict typed language with no decent debugger and profiler, that there is no solution for vector-based animation, that HTML/JS is a decade behind Flash when it comes to connectivity, that... all those facts shouldn't stop people praising HTML5 as the next Messiah that will never come.
So, you have a problem with developers, not the technology. The list of badly developed HTML pages is at least ten times longer than of those created in, or utilizing Flash. Does that mean that HTML sucks (well, it does, but that's a whole other subject)? The list of badly developed C++ applications is even more staggering, does that mean that C++ sucks and that it needs to die?
Flash is a technology like any other - how people will choose to implement it is their problem. Bad developers develop bad things, no matter of the technology. Blame the developers!