The most difficult barrier I have seen so far has been what I've dubbed "trying to sprint the marathon" - learners who rush to put a checkmark on a particular stage or process in their growth, rather than allowing for the natural growth to really set in. In chasing an admirable but still distant goal, they become prone to looking for shortcuts and setting themselves up for disappointment, when a promotion does arrive right at the year mark, when they receive a rejection for a position transfer, or when they are unable to land a job within 2-4 weeks out of instruction.
