I have no problem with him being "salty as a sailor", and while that's a separate issue of annoyance for many, it's the substance of his policy and leadership (or lack thereof) that people have a problem with.
LBJ was by far the most crude and "salty" President in recent history, aside from frequent salty language, he was known to enjoy showing others his male member, when having a conversation with someone in the oval office he would insist that the staffer, journalist, congressperson, etc accompany him into the bathroom so they could carry on their conversation uninterrupted while he pooped, he also once stripped naked during a press gaggle on Air Force One because he said it was hot.
Despite all of that, his political resume is commonly viewed separate from his personality 'quirks'. I don't think Trump is held to a different standard, although to deflect from his political resume Team Trump is quick to suggest any criticism of him politically is just because people find him uncouth, rather than try to debate the substance of his presidency.
I notice that when Trump supporters try to list his successes, those examples become extremely vague, as though they're taking Trump's word for his claims of successful leadership without feeling the need to evaluate that for themselves. It's like if my all-too-trusting grandma told me excitedly about how a used car dealer got her trade her brand new Mercedes for a used Yugo and how much she benefitted from this trade because the used car salesman told her how much better it was to have a used Yugo and she took his word for it.
Trump defined what a successful Presidency would look like for him prior to taking office, just objectively he hasn't gotten anywhere near that definition, so I'm not sure what there is to be excited about, except that Team Trump told you that you should be excited, enjoy your Yugo I guess.