Probably one should judge a President's term by praising/criticising the previous President.In Europe unemployment is going to historical lows nowadays and salaries rise. But we don't have a magician like Trump.
In plain English: It is is not a result of Trump, it is just economy that is booming, and by accident it happens while Trump is president.
But politicians always tell it's is their merit... except if things go wrong, because then it is somebody elses fault. And simple people believe this.
It takes some years for the policies to work through giving the next guy a bonus or otherwise.
Gawd help the poor soul who succeeds Dump and has to start over.