As a whole, Wander is worth watching; it's a very entertaining show. The gags mostly land, the main four are great (especially Hater and Peepers), the soundtrack is stellar, and there are various other positives.
Dominator herself shows up sporadically in Season 2, but only starts to be more prevalent after The Battle Royale. I wish she had gotten more screentime, but as is she's a very good deconstruction of what it means to be a Chaotic Evil person; that being a psychotic, inhuman monster that is incapable of empathy and wants to destroy anything she comes into contact with, while also being a depressed, reclusive manchild desperate for companionship as a result of the former part driving away everyone she's ever met. These ideals constantly clash, making her a thoroughly miserable person that is only ever happy when indulging her fucked up urges. If you like dark characters, she's also appealing, because the show constantly alludes to her doing TV-MA shit off-screen.