Strange you have had a bad experience. All of the LPs I have bought from Amazon (and it's lots) have come in a custom LP cardboard package, which has then been put in a box. My complaint has been the excessive use of packaging. Now the number of LPs I've returned due to poor pressings in a different story. Cheers.
Finally, Amazon Learns to Package Records.
I must have sent at least 20 damaged records/covers back to Amazon because of silly packaging. It was so bad I stopped buying records from them. Last week I had to order three records from Amazon because they were the only store to have them. They came beautifully packed in the same cardboard record boxes that Elusive Disc uses and double boxed with padding!