If that's what your OKRs look like as a developer, then your company is doing them very wrong. They're supposed to be hierarchical, becoming more concrete as you go down the line. Your examples sound like top-level OKRs; mine are usually something like "internationalize feature x, launch in Y locales" or "Implement feature Z, measure effect on meric A".
Which is not to say the OKR system doesn't still have issues, they just look more like the ones discussed in the OP.
Which is not to say the OKR system doesn't still have issues, they just look more like the ones discussed in the OP.