Noach Ish Tzadik…b’dorosov.
Torah calls him a tzadik (and Torah does not lie). In the dor of Avrohom he might have been even greater or a nobody, but in his dor he was a tzaddik.
(BTW Avrohom was not called by such a title!)
Is it “a huge disrespect to them” to compare Avrohom to Noach? You probably think so, but Torah does compare them!
Note: I used the word “compare” so do not twist, distrort or confuse yourself.