From my personal experiences, to what I have heard from others, it seems bureaucrats are the sole reason for hindrance(major/minor) in any ongoing works in Nepal in every sector, that requires their involvement. The majority issues I have heard are:
2.Acting the supreme power and narcissist.
3.Not accepting good and positive changes that will make work faster as it hinders their commission.
4.Suggesting badly to the minister or simply not co-operating with a minister, if he diverts to other plans by willingly slowing down the entire process.(not saying that ministers are innocent. They are also equally as bad.)
5. Not willing to do anything, unless there is some monetary value for them, or a political pressure.
6. Delay in decision making, purposely, waiting for the right time for personal benefits.
Please add others if any.