As someone said up there, it was good when it was about a journey of the self.
Personally I liked star when she was trying to be strong and independant. cause S2 and parts of S3 had that "north" like, yeah, Marco is literally fucking Jackie and Hekapoo. While star, knowing this, is crying but little by little accepting it, and leaves... fucking marco's social life in the process? yeah... but does what is for the best...
Now they fucked up during S3 when out of nowhere marco forced himself in star's life cause "muh knighthood", degrading him to be a buffon that not even the dirty peasants respect... and began to threw the show to starcofag levels that they knew will ruin the show and give them only a fragment of it's fans... the worst part in that "romance" stuff was to retcon star and marco to the "love at first sight" dumb crap