Yes, it's okay. No, it's not petty and spoiled. You don't need anybody's permission to reject a job for any reason. Don't let people pressure you into serious

Yes, it's okay. No, it's not petty and spoiled. You don't need anybody's permission to reject a job for any reason. Don't let people pressure you into serious commitments. If you don't want to work with Teams for $X, don't do it. You shouldn't care what other people will think of you for not taking a job. The opinions of people who would judge you for this decision are not worth considering.