I enjoyed it, 3.5/5 stars, but there are issues beyond the self referentiality.
It feels overlong. The constant fights between Deadpool and Wolverine grow tiresome. The swearing is at the level of a 12 year old trying to be edgy.
Those are actual complaints that don’t involve the subject matter, which I’m totally down for. I was slightly disapponted they went with a Music Man reference instead of Greatest Showman, but fine, whatever.