There are small outlier countries like Singapore that have extremely well but at scale democratic countries have greatly outperformed other systems
I do work that social media will change this though
You see this on smaller scales as well. Most of people's complaints about "capitalism" are really about the short sighted decisions corporate leadership often make because it has to answer to an anonymous mob of shareholders.
The only thing that actually works is good leadership with long term vision and if anything democracy gets in the way of that.
You say Democracies have a short track record. While this is true in the grand scheme of things, each individual non-Democracy that came before did as well. Rulers conquered each other's countries, usurped the current leaders etc. quite regularly. I'm not sure I'd count that as stable and longer-lasting.
I actually said the exact opposite.