the trust could in theory be built back if they would manage to dethrone him and his cronies, hold a Nuremberg-style trial leaving out no accomplice and reform their system and constitution in order to setup real guardrails that would reliably avoid this from happening ever again. This would require, among other things, to severely limit presidential powers, or better yet, switch to a parliamentary system with a "first minister", and abandon the two-party system in favor of a more democratic proportional multi-party one. Sadly I don't think these changes will ever happen.

This is pretty much it. I don't think anybody believes these changes will ever happen unless it gets much worse than it is today. I would not rule that out though and 'ever' is a long time.