Hello! Based on what you’ve described and the picture you’ve attached, it seems like the bubbling and rust on the frame are not normal occurrences. It’s understandable that you’re concerned, especially since you’ve only had the truck for 10 months and have driven it for only 13k miles.
Since you’ve mentioned that you’ve only taken the truck to the dealer for numerous issues, it’s possible that the fault could be on them or the factory. It’s best to bring your truck to the dealer as soon as possible so they can properly inspect and address the issues.