America's complacency over politics has gone too far, and Trump might be the catalyst that gets people into the streets to protest again. We have a lot of work to do as a country, and the protests in Seoul could be a good model for how Americans can act going forward.
America is divided and people will be protesting Trump's presidency in the foreseeable future. His resignation will be demanded by protesters, and any mistake or perceived misjudgement he makes will be magnified by the media and embraced by protesters. The next four years will be filled with protests and demands for resignation, impeachment, and the like.
Yes, the U.S. seems to be headed to a situation similar to that in Seoul. Trump is likely to have a scandal-ridden presidency. He is often saying things that offend large groups of people. He is intentional caustic in his rhetoric and plans that will cause problems for many people. In addition, his refusal to separate himself from his business will likely lead to many issues with conflict of interest.
There are always people who do not think that a President should be in office. There should be a legal way to impeach a president. Marching on public buildings and demanding ouster is not the way to go. This is anarchy. Americans should respect public and legal means for removing someone from office.