I think you're completely right. President Pence would be no better, in fact he'd be worse because he'd actually be able to work with the Republican leadership in Congress to push their wealth-concentrating agenda. The 'silver lining' of the Trump presidency is that he's so incompetent and so pre-occupied with his own affairs that can't actually get anything accomplished.
Think about with might happen when Mueller releases his report and it's just full of incriminating evidence about Trump. Which would be worse for the Republican Party (and better for American democracy)--for the Repubs to come to their senses, to realize it was a huge mistake to put this guy in the White House, for them to immediately bring impeachment proceedings and force Trump to resign? Or for them to totally ignore the report, call it 'fake news' or 'Democrat sabotage' or whatever, and try to go on as before? The latter is probably what they'll do, and it will do serious damage to the party in the long run.