Can someone explain this mess?

[DonV]

Change that red pvc valve to a real brass seacock.

Change that black corrugated hose to something better, it is well documented that hose is garbage.

For sure, without a doubt!!! And just to let you know plastic "tie wraps" are like $2.00 for a bag of 100. Looks like you could use some 4" and 7" ones to clean up the mess.