The Maharal complained about him, bitterly. Yet, he referred to him as Reb Azaria. In today’s setting he would hardly be noticed and anyone trying to refute him would be mocked.
In his Sefer he brings many sources to give a different account of history than that of Chazal. He explained that as long as you don’t argue in Halacha you are fine. Sounds familiar. He went a bit further than that, too.
It is said that the Beis Yosef wanted to put him or the Sefer in Cherem but it never worked out.
The Emunas Chachamim, Reb Aviad Sar Shalom, referred to him as Hu Edom Ushmo Edom, but the Yaavetz said Al Teta’ev Es Ho’adomi. This sounds like what Reb Chaim Kanievsky said about some people today, that although we believe they are wrong, they can’t be called Apikursim.