DS19 is my bio and he and a friend are doing a bunch of handyman jobs for DH.

DH is not frustrated for the typical skid reasons (lazy, sloppy, late, etc.). Nope, DH is frustrated because the kids are working more diligently than he expected and he had to run a couple errands to get stuff to stay ahead of them and finish up his own part of the jobs. 
 

(Contrast this to OSS19 who barely talks to DH, won't do things with DH, and apparently plays video games most of the day at BMs. Hm. Wonder if the difference in kids had anything to do with the difference in the parenting? Nah, that would just be a silly thing that parenting would affect that.)