Shonen anime is well-known for its many conventions, tropes, running gags, and clichés. This the genre the most formulaic anime of all, both for good and for ill. This encompasses everything from the virtue of never giving up to "zero to hero" arcs to ever-present rivalries. Shonen rivalries can contribute a lot to a story, but they also feel overdone in some fans' eyes.
Source:https://www.cbr.com/shonen-rivalries/