Not much to say here, poor workmanship is common in every industry. My doctor friends even say that most gp's are total rubbish, and that's about as regulated and difficult to obtain qualifications for as any industry gets. So, I guess it's no surprise these panels have this kind of wiring.
Whenever I see something this bad, it makes want to go and give our boys a big hug for being so wonderful. Solar company owners take note, sometimes it's worth paying your boys a little more to ensure you don't have to fix this kind of crap afterwards!
Though on the other hand, if you do we won't have as much fix up work🤣🤪.