How did you got that impression?

There is the universal hate for flash because it was used for ads and had shitty security, but anyone I know who actually used AS3 loved it.

At its peak, with flex builder, we also had a full blown UI Editor, where you could just add your own custom elements designed directly with flash ... and then it was all killed because Apple did not dare to open source it, or put serious efforts on their own into improving the technical base of the flash player (that had aquired lots of technical dept).

> There is the universal hate for flash because it was used for ads and had shitty security

That's only one side of it. Flash was the precursor to the indie/mobile gamedev industry we have today (Newgrounds, Miniclip, Armor Games), before smartphones become ubiquitous. Not to mention some rather creative websites, albeit at the cost of accessibility .

Flash's only fault was it's creators were gobbled up by Adobe, who left it in the shitter and ignored the complaints people had about it's security issues.

It was also leaking memory, which made it very unsuitable for anything long running (like long-running screen displays, ask me how I know).