a lousy dado set used on crummy wood ....
Will give you what you got there. That wood is not helping, the HHS cutters probably have seen better days and the result is tear out.
Probably Ok for construction work, not woodworking. JMO.
Safety is probably not an issue if the work is held securely against the miter gauge or the fence on a radial arm saw. Me, I would not use it and get a new one as suggested by knotscott above.
The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)