Getting creamed in North Myrtle Beach

Hi

this is my third year Hosting in North Myrtle Beach (remotely from Chicago).   The last two years, my occupancy rate has dipped below 30% and I'm trying to figure out if this is a common thing in that area or what I might be doing wrong. The reviews have been quite good... so it's not that.
I'm considering selling because I'm not covering my mortgage with the rentals anymore.  I've even considered hiring management in case they can help get the numbers up.  Is anyone else struggling with short-term rentals in this area?