This whole setup came out of the backing so I’d like to replace the whole thing but I don’t have pipes, the supply line is hoses so I’m not sure what kind of valve I need to look at.
The fix should be a fast one. Basically, they'll likely just shorten the current line, add an elbow and stub it out of the wall at the 90 degrees it should have been from the beginning. They wouldn't reuse the valve so you'd get a new one in the process.
A proper install would have mounted the elbow to a backing plate in the wall cavity so that the valve can't move around but at this point!, that would require removing some drywall so a plumber might not do that. Its not something that has to be done but just hold the valve body to support it with one hand as you turn it on or off with the other.