UK and Germany weren't ever good in this department but now worst than ever.
US supposedly good but I wouldn't risk it in practice.
Australia I hear is also quite bad.
Canada and NZ I don't know.
I expect Denmark and Sweden to have somewhat weak free speech laws too.
Norway and Finland I expect to be good.
France I expect to be just slightly better than Germany.
Netherlands and Switzerland, I have no idea.
Czech Republic I think has strong protections.
Italy and Spain and Ireland, I heard mixed reports about.
Poland, Greece, Slovenia, Portugal and other unnamed countries I don't know at all.