lackluster

US /ˈlækˌlʌs.tɚ/
UK /ˈlækˌlʌs.tɚ/
"lackluster" picture
1.

lacking in vitality, force, or conviction; uninspired or uninspiring

:
The team gave a lackluster performance in the first half.
Despite the grand setting, the play itself was rather lackluster.