2018 Forte, 17k miles, low compression on #2

So I made a post a few days ago about my issues with my engine misfiring after being "repaired" twice. Today I took it back again and the dealer explained that cylinder #2 had lower compression than the others. They've given me a rental while they work with Kia HQ on what steps to take in the meantime, but I'm pretty disappointed. I've had the car for 4 months, was really liking it, and now I can't even drive it. I am at least VERY thankful that my car was a certified pre-owned, because the whole thing looks like it will be covered by the warranty.

Would anyone like to share experiences or advice for me?