This appears to be rather daft propaganda. If we had never climbed this mountain would be do so now? That does not make a convincing argument for jumping off of a cliff. Moreover the article rehashed a number of debunked arguments. For example it states that the EU Parliament does not have the power to amend or reject legislation. This is nonsense.

[europarl.europa.eu]

It states the Europe has 5 presidents.

I'll accept that understanding EU government can be complicated - not least by the lack of imagination in the language used but it doesn't help when the willfully ignorant spread misinformation. Most governments have an executive, and one or two legislative houses. Each have their own head. In the EU these heads are all called presidents. That's a gift to propagandists but not a true democratic deficit.

The article names three and suggests they are immensely powerful and unaccountable. In fact they clearly are accountable to Parliament and having separate and independent branches of government is often pointed to as a sign of democracy rather than a deficit.

It names Jean Claude Junker who was at the time of writing was the President of the European Commission, the executive branch of the of the EU. This is a truly powerful position but not without checks and balances. Also Donald Tusk - President of the EU Council. That's the branch of the legislature comprised of the elected heads of government of the EU member states. He chairs their meetings, sometimes called EU summits but doesn't have voting power. As such he technically wielded more power when he was Prime Minister of Poland and attended the summit meetings as a member rather than president. Finally it mentioned Guy Verhofstadt who as far as I can see has never been President of any of these EU institutions. He is head of the a European Political Party ALDE, and was the EU Parliament's representative for Brexit negotiations but the President of the EU Parliament for that time was Antonio Tajani. It's not clear who this author thinks are the other Presidents but similar claimants to the 5 presidents meme have mentioned the President of the Eurogroup (A meeting of finance ministers of the countries using the Euro) and the President of European Central Bank. If you don't think that's a bit of a stretch then why stop there? Nicos Anastasiades as the head of state for Cyprus is also styled "President" as is Emmanuel Macron of France, Klaus Werner Iohannis of Romania and Dalia Grybauskaitė of Lithuania. Heck you might as well add Aleksander Čeferin the President of the European Football Association (UEFA)

Hypothetical questions are stupid....because any answers would also be only a hypothesis....a completely pointless exercise when there are so many real questions that we need to address.

If the UK had never joined the the EU would the EU even want them to join at this time?

You are not British. You comment on something you have no idea about. Brexit will damage us. The end