describing a highly competent, domestically popular & highly trusted government as 'MAGA' is perhaps one of the most pro MAGA statements i have ever heard. the fact that in spite of all of it's problems and what is essentially at this point a whole generation of recession, japan continues to be a high trust society with civil services and infrastructure that is the rival of the rest of the world speaks very highly of the japanese system's integrity. consider that at the peak of our prior recession, many us state & local governments essentially ceased to function.
Japanese people complain about everything, especially when it's anonymous. Just look at Google maps reviews, or product reviews on amazon.co.jp: you'll see 1-star reviews for stuff just because something wasn't quite perfect. It's probably the same for the politicians; they complain, but the alternatives are worse in their minds.
Plus, much of the population is elderly, and their preferences are quite different than the younger people you hear more from.