Regardless of all the bad stuff people try to point out about Trump, one common theme over the last 3 years is that most politicians in D.C. are worse. They try to hide it behind a veneer of fake civility where Trump doesn't bother.
That, and I think some of the questionable activity that this administration has done...they aren't adept at the art of the cover up, nor do they have the media on their side to assist in burying negative news.
Think about the things we know the Obama administration did, including opening investigations into the Trump campaign. Literally the exact same thing that Trump was accused of doing with Ukraine.