I won't offer an opinion on the misogyny question, but I will say this: As an unrepentant lover of the horror genre (and all its various subgenres), and as someone who has also had horror-thriller mystery novels published, I really do not care for the Terrifier series. Visceral gore alone does not interest me. There has to be some interesting thematic context to give the gore power (The chestburster in Alien, for instance, or The Substance is another good recent example, in which the extreme body horror gore is part of a satire about absurd beauty standards). Or there has to be a good story. Or it has to be genuinely scary. Or darkly funny.
The Terrifier films have none of that. They have none of David Cronenberg's intelligence alongside the body horror (The Fly, The Brood, Videodrome, etc), none of John Carpenter's suspense (Halloween, The Thing), none of Jennifer Kent's psychological terror (The Babadook), none of Wes Craven's deft, self-questioning pastiche (Scream, etc), none of Sam Raimi's dark comedy (The Evil Dead, Drag Her to Hell, etc), and frankly they simply are not scary. Merely repugnant.
The Terrifier films fail to understand the masochistic catharsis of the core horror audience: We want to be terrified. We don't want to revel in boring sadism. There is an important difference.