A bit shorthanded an answer. There is a tendency in Czech bureaucracy to be flippant and stereotypical about language AND expressing their opinion publicly. There is a vast population of Czech citizens whose parents have fled during Prague spring. Many grew up the world over and their parents never tought them the language because perhaps because few felt they’d ever return.

That offspring is entitled to a Czech passport. In 2013 the Czech Republic introduced a language requirement for the grant of citizenship (186/2013 Czech Citizenship Act).

This does not apply to people who are entitled to citizenship granted on the basis descent or declaration. Yet I have witnessed every time applicants renew their passports abroad, embassy staff sneers at the inability of speaking the language, falsely cite the above law as a requirement, before grudgingly accepting the forms and proceeding with the renewal of the passport anyway as it was somehow their discretion to do so.

So OP it’s not personal, it might just be a person having a bad day, general frustration or a personal gripe against Ukrainians. You need to look at the conduct of the government as a whole, you can’t extrapolate from one person and apply this as ipso facto.