FWIW, I think the problem with that plotline isn't so much the plot itself as the execution - I've read lots of satisfying fics with that story arc, but other fics fail because the author doesn't come up with a plausible reason for why the misunderstanding/fight couldn't have been resolved more simply. So, point being, I think that general arc can work, it's just that you need a good reason for the breakup; too many authors rely on a fairly mild misunderstanding.
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