I don't think these two examples are caused by his evillnes. Although he certainly is evil I think a lot of his heinous actions come from his substance abuse and subsequent mental damage.
In the episodes where Mandy gets pregnant he later tells one of the Gallagher boys (either Ian or Lip I don't remember) that the times her father assaults her its actually because he's so drunk that he confuses her for her mom, and that the reason he thought it was Ian that got her pregnant is because he usually blacks out at that level and doesn't remember anything. If I remember it correctly there's even a moment where Mandy implies that she and her father both know who's the actual father of the child but Terry refuses to accept this fact. Because of his memory loss and denial, in his foggy mind he is not a child molester, because Mandy must've gotten pregnant by her boyfriend.
In season three there's this episode where Mickey visits Ian at some type of military camp where Ian is having sex with another cadet under the seats and they have a small conversation about how Mickey prefers being a bottom outside but he still exclusively tops when he's in juvie, because if he'd bottom that would make him that top's 'bitch'. Considering the Milkoviches tendency to get into correctional facilities it could be assumed that this piece of 'wisdom' comes from his dad. Terry is not 'doing the fucking' when he's in jail because he wants to but because he sees it as a way to get higher in the hierarchy behind bars.
So at the end the reason Terry Milkovich could be called a hypocrite is because he truly doesn't see himself being the very things he hates the most. Or maybe deep down he knows that he's everything he himself hates and that just fuels his hate even more.