The H code may be one of those years where the inside of the socket has a bit of a nipple that locks the leg in.
Use a penetrating oil to free up any gunk, soak it for a few days and then hose it out so you can get loose debris out.
lube it up again, either with the oil or with silicon grease, twist back and forth and back and forth and back and forth while gently pulling away from the bowl.
I would probably fix sockets first.
Or wrap the socket in masking tape and then duct tape so you can grip it with a pair of channel locks or a pipe wrench
good luck!