On the other hand the Japanese economy has been quite stagnant since 1990, and the yen is right now on a downwards spiral, so I don't think it is such a good solution.
And as a gaijin living in Japan, I usually get extremely pissed off at the extreme inefficiency of Japanese companies, things that in any other country would take one month here take 5 years.
Every country has their own problems. Honestly, there aren't a single large country where everything is perfect. Too many opinions, too many needs, increase median age of the politicians and the population, and etc. causes imperfect solution to every problem. At the end of the day, you have to prioritize and figure out what's important to you.
I agree with literally every point you made. Sure economy is stagnant, but I'd rather take stagnant economy than a collapsing one. I agree with a lot of things are slow, but also, most of things are just... not a big deal, at least for me? I lived in Canada, and have parts of my family living in NYC as well. For every slow government related slow things, you can find something that's also slow in the NA as well. I'm not going to mention Europe at this point, as from what I've witness from my European partner, you can find inefficiencies there as well. Again, pros and cons everywhere, just gotta pick and choose what matters to you.