tasteless

adj

1. Having no flavour; bland; insipid.

   “Near-synonym: untasteable”

   “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.”