leave a lot, much, etc. to be desired

leave a lot to be desired

To be very inadequate or unsatisfactory; to lack a large amount of what is desired or required. The film has a very interesting premise and a story that has quite a bit of potential, but the final product leaves a lot to be desired. I wasn't expecting a huge amount from a budget hostel, but this place leaves a lot to be desired nonetheless.
See also: desire, leave, lot
Farlex Dictionary of Idioms.

leave a lot, much, etc. to be deˈsired

not be good enough: Your standard of work has gone down. In fact it leaves a great deal to be desired. The acting in some of those early movies left much to be desired.
See also: desire, leave
Farlex Partner Idioms Dictionary
See also:
  • leave a lot to be desired
  • much
  • leave lots to be desired
  • leave much to be desired
  • leave a great deal to be desired
  • leave something to be desired
  • under control
  • be not up to the mark
  • be under par
  • it/that will never do