Looking on the internet deeply has found these results:

badly maintained is the most popular phrase on the web.

being poorly maintained 15,410 results on the web	badly maintained 1288,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It's kind of like riding a poorly maintained carnival ride. It doesn't look like a lot of poorly maintained Its aim is not to attempt to replicate real world conditions but to identify vehicles that are poorly maintained. This is definitely not poorly maintained. It's kind of like riding a poorly maintained carnival ride. Its aim is not to attempt to replicate real world conditions but to identify vehicles that are poorly maintained. single family homes.	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

being poorly maintained

15,410 results on the web

badly maintained

1288,000 results on the web

More popular!

It's kind of like riding a poorly maintained carnival ride.
It doesn't look like a lot of poorly maintained
Its aim is not to attempt to replicate real world conditions but to identify vehicles that are poorly maintained.
This is definitely not poorly maintained.
It's kind of like riding a poorly maintained carnival ride.
Its aim is not to attempt to replicate real world conditions but to identify vehicles that are poorly maintained.
single
family homes.

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.