I hate html, wasm, css, javascript as much as flash when they're used to waste my battery, cpu and ram with pointless effects when I'm browsing.

Love them when they're either getting out of the way of my content or used to make a great game.

I think people hate(d) working with it and the security flaws it had.

I don't think I've seen people hating the content created with it.

> Everyone on HN hates on things like Flash

That's clearly not true. Is that a rhetoric expression? Because I just wrote about Flash games being great - and I wasn't the only one doing so either.