Response from LEGO SHOP
3 August 2020
Emily, Customer ServiceWe're sorry to hear you were disappointed in this set. From the pictures you provided, it looks like something went a little wrong in step 21 or earlier. That long black piece should be flush with the ones added in step 22. A little rebuilding should do the trick. If you need a hand troubleshooting the build, you can always get in touch at LEGO.build/Service-BV.