u/Fit-Print-4807

I Googled to check if this plumbing system was right because obviously something was wrong since the pipes are clean. I figured it was the setup since the water traps before it even makes it pass the middle tube. How do you fix this issue? My landlord says the whole place has plumbing issues but having to get the pipes pumped twice a year kind seems like the setup is most likely not by a professional. Opinions?