They’ve paid with relentless economic shock therapy and the complete destruction of any Ukrainian industries by US and European corporations. Even Ukrainian farmland isn’t safe from this:
https://www.oaklandinstitute.org/new-report-take-over-ukrainian-agricultural-land
Zelenskyy has also attempted to ban trade unions, which even the EU thinks is extreme
https://www.socialeurope.eu/eu-concerned-by-ukraines-controversial-labour-reforms