unimpressive       
adjective uk/ˌʌn.ɪmˈpres.ɪv/ us/ˌʌn.ɪmˈpres.ɪv/
 给人印象不深的,不惹人注意的,稀松平常的
not making you feel admiration or respect
  Improvement was needed after the team's unimpressive start to the season. 球队本赛季开局平平,需要改进。 
 Despite its promises, this government's record is unimpressive. 尽管做出了承诺,但这届政府的记录并没有可圈可点的地方。 
 See: unimpressed
 - More examples
 - The coach has told fans not to be alarmed by his side's unimpressive performances.
 - He was an unimpressive witness, more concerned with making an impression than answering questions.
 - An unimpressive figure, he was part of the disastrous 2017 election team.