Anyone see a problem here?
Handyman plumbing!!! Open J box. What is the flex vent for? That is some of the things I would write.
The vent was for the dryer!
Where the sink is located is where the dryer was designed to go.
I think Mr. Handyman put in a stacked washer and dryer.
thats the new J-trap being used DUH!
Also gotta love the open junction box with the exposed conductors …
Hey why is the glass always half empty?
Give the guy credit for using corrugated venting.
And the majority of its span in that picture isn’t crushed. 
Good thinking !!
He was very innovative !!
The plumbing could have definitely been done better, but functionally, it appears to be just a p trap.