I actually had hopes that this entire story all about a vicious brutal cycle was going to end in a very satisfying way, that we can appreciate something out of it whether it ends tragically nonetheless or in a "we break the cycle against all odds" approach. Though this looks like the tragedy we have been expecting, this sudden twist is deeply unsatisfying. The author's just toying with the audience now, and you could argue it's an artistic choice, the story is getting ruined by this whim of the author as a consequence. The only way this can be salvaged to some extent is if, like others commented, this was all a dream/nightmare. That doesn't fix the entire story though because the title literally is about a cycle of violence. What happened to all the stuff about "cycle"? This could have been a true masterpiece, but of course, it's just violence porn at the end of the day. At this rate, you gain nothing from reading this.
One possible silver lining I can take from this though is if I look at this from a meta-ish perspective. The author is trapped in their own cycle of writing shit endings, and this story is no different. Quite poetic if that's the case.