Your trunk sounds like a creaky trunk springs my buddy has this on his TSX ha ha see spending more wouldn't fix this issue.

His issue is being fixed by replacement of the plastic clip on the rear deck that hold the torsion springs. Does your Accord have a spoiler? His likely started this after the spoiler install.

I hardly think your car is a lemon, I have yet to see a single problem in your post that couldn't be solved by a compotent-caring dealership. Go to a new dealer, I had a bad dealer experience for a warranty claim once almost made me part with the Accord. Cheer up and find a new dealer you will be much happier.