Heeelp. I'm trapped in hours and hours of content, slowly chipping away at achievements.
Also... DELIRIUM WAS ADDED TO THIS DLC?! :o I thought that was a Repentance exclusive!
In all seriousness, this DLC does add a decent bit of items and such, not to the scale of Afterbirth. Plus, most of what people were/are angry about is more than likely patched in Repentance. If it's really that intolerable to you, and you only have Afterbirth, just uninstall AB+ and just enjoy the 1st DLC. Or... get Repentance with Afterbirth+, assuming you're already fully invested into this series. This DLC isn't meant for the kindhearted (same goes for Repentance), and you will face some bull bull (as Dashiegames would say) along the way.
Before I started playing Dark Souls, this was the closest thing to a Soul's game for me, in terms of difficulty. Just treat your experience similar to the Dark Souls franchise... pick up the pieces, strategize, get good, and keep going. The game is as beatable as you want it to be.