the wall is painted a really nasty color of pink!
the rest of it looks like it meets code.
The liner (vent) is multi tasking…looks like a piece of a downspout elbow connection
Duct tape (nice seal)???
Liner (vent) should be vertical?
Possible Asbestos coverings?
Looks like a cut floor joist top of picture?
Main drain leaking?(maybe light from camera flash)
Are the people still alive? I really hope so.
hey- pipes is pipes, right?