IPA: /ˌʌn.kəmˈpɛt.ɪ.tɪv/
KK: /ʌnˈkɒmpətɪtɪv/
Not inclined to compete or engage in competition; lacking competitiveness.
The uncompetitive nature of the team made it difficult for them to win any matches.
Uncompetitive → It is formed from "un-" (meaning not) and "competitive" (from Latin "competere", meaning to strive together). The word "uncompetitive" means not striving together or lacking competition.
Think of 'not' ('un-') being added to 'striving together' ('competere') — that's why uncompetitive means lacking competition.