I know it is trivial but the star shape of the inter-dimensional portal felt like a little kiddie show.
Yeah that bothered me too. Seemed like it was supposed to emphasize that she is AMERICA Chavez, since in comic books her character has a large star on the front of her shirt. But it was just plain dumb.
Out of all the MCU movies, seemed like this had the most potential and they dropped the ball. Meanwhile you look at some of the IPs that you thought had no potential whatsoever like Ant-Man and they managed to make that enjoyable from start to finish.