tasteless

adjective2

1. •
   Having no flavour; bland; insipid.

   • They accused the cook of being a hack, claiming that the soup was tasteless.
2. •
   Lacking delicacy, refinement, and good taste; unbecoming; crass.

   • They accused the designer of being a tasteless hack.
   • That was a rather tasteless attack on the designer, especially given that many people like the design.