What is the point of having a stirrup, no worries I'll fix it

Oh this is only the beginning, all joists and bearers will be removed, the rot in them is too great, totally agree it needs a tidy up, what you are…

So I've taken up about the first 4 decking boards and I've come across this. Now I'm no Master-builder or Plumber but even I can see this is not great.…