I have a 2004 Triton 21x that I have had a difficult time getting damage to the hull repaired. There has been 3 attempts by my local fiberglass shop to repair the bottom of the boat. The repair is in the same place each time and only last a couple months. the question I have is do I need to find another fiberglass shop or is there something structurally wrong with the boat. I've included pictures of the bottom of the boat where the issues is, along with crack in the transom that has begun to form. Any input would be much appreciated.