Starship's design is so far beyond where the rest of the world is that even if it takes another 3 years of iteration to perfect it will still be by far the best rocket in the world for many years afterward, to the point where it would hardly make sense to choose to launch on any other existing or currently in development rocket for any reason other than political ones.
If a design with a bunch of modifications works, then it's a good design. Thinking you need to clean sheet redesign everything is how you get Second System Syndrome.