Agarose gel Ladder smear
Are you sure that your TBE is at the right dilution? And that you're using TBE to make the gel and also as the buffer for running?  That sort of wavy line looks like what you might get if you'd made the gel with water instead of buffer, or run it with water instead of buffer.  You could also try using TAE to make/run the gel as a sanity check.