Who all are claiming it to be a masterpiece I don't know what's wrong with them.
Then you should stop acting as if there's something wrong with those who want to call it a masterpiece because it's their opinion. There have been some public reviews on YouTube where people praised the film and call it a masterpiece. This word is how the movie should be described because that's how good Tanhaji was.
Before criticising, you should have done some research to find out who Udyaban Rathod Singh was. That character that Saif Ali Khan played was important. So remove him, then the biopic for this film would have been incomplete.
Anyway, Tanhaji was a terrific movie.................