The west tolerates nearly all of the corruption in Ukraine but keeps tight control of two political organs in Ukraine - NABU and SAPO.
These "anti corruption agencies" will mostly hear and see no evil until a politican in Ukraine deviates from western foreign policy goals. Then they "discover" how corrupt this one individual turned out to be and crack down on them until everybody is once again on the same page.
Twice they have threatened Zelensky (once when he tried to bring the agencies under his direct control) and twice he has backed down.
Bombing a school is unconscionable but its a shadow of Russia's crimes in Ukraine.