Note that pure, direct, open democracy is not implemented in pretty much any country because it's dangerous. The people do not know how to run a country, they don't understand international politics or economics.
Take Brexit for example. A case were open democracy back fired really badly and allowed a win for xenophobes, racists and bigots without a single clue what exactly it meant or what the plan was... there wasn't a plan, nobody expected it to go "YES".
The plan, of course, is to be as the UK was before 1970, and as such awful countries as Australia, Canada, and New Zealand are now, managing their own immigration and their own trading environment.
Wait ... but they're not awful! They are universally regarded as among the best places in the world to live, well above both the USA and UK on virtually every measure except raw income. Look at any independently compiled list of the most free, best health, longest life, best standard of living etc etc and you'll find those countries near the top, along with the same usual suspects of the Norway, Sweden, Finland, Denmark, Netherlands, Austria, Switzerland. That's going to be your top ten, right there, in most cases.
Another example which thankfully hasn't happened, but could you imagine the response to:
"Would you like all corporations in the UK to pay full tax without any deals, rebates or concessions?"
I can guarantee the mass populace would vote "YES" in a huge land slide. In a years time all big business would leave the country to seek a better tax environment elsewhere . Trashing the economy overnight.
That is another case where this would in fact be a GOOD THING, provided only that the official nominal tax rate was lowered so as to collect the same amount of tax.
That would benefit the economy hugely, and cause companies to flock to the UK.
The only people it would hurt would be accountants and lawyers.
I do agree that pure representative democracy would be a bad thing. But you picked terrible examples to illustrate it!