2023 Mercedes-benz Glb250 Tires

These came as stock tires on our 2023 M-B GLB 250 in a 235/50/19. They were ok for the first 10K miles with rotations performed every 5K. Since then, (now at 16K) they are a mess. Already showing significant signs of wear with inflation check and adjusted with all major temperature fluctuations. Now they have started to "sing" everywhere we go. It gets worse under braking. The final straw is the wet traction has disappeared. They want to hydroplane even at low speeds and feel disconnected from the road. I'm getting in touch with the dealer to see if they will help with a credit towards replacement. If not, I'll gladly tear these off and replace.