"badly functioning" is grammatically correct and usable in written English.
You can use it whenever you want to describe something that is not functioning very well. For example, "The printer was badly functioning, so I had to contact the tech support team."
He remembers it as an "extremely dark, badly functioning, complicated building".
Some projects are bound to be unprofitable given its badly functioning financial system and government meddling.
"We have to manage a badly functioning bureaucracy to get it to provide badly needed services," he said.
Ukraine has the world's highest coal industry death rate, attributed largely to outdated and badly functioning equipment and miners' neglect of safety rules.
Its combination of a badly functioning banking system, excessively cheap money and heavy government meddling is bound to result in some bad investment decisions.
Much like the cacophony of architectural styles on display, individual buildings vary in the degree of modernity and comfort – and some exude a kind of shabbiness associated with a humid climate, poor ventilation, badly functioning air conditioning and the overwhelming smell of food.
The first thing you notice, rereading Valley of the Dolls is how badly it functions as fiction.
At the heart of a properly functioning market economy is the principle that very badly run firms go to the wall.
The tertiary systems had been functioning badly from the onset, but degraded further due to the absence of effective management arrangements, tensions between subak and WUA, and the rejection by many Balinese of the engineering solution to water distribution inside the TUs of Public Works systems: the gated water division boxes for rotational irrigation (see also Roth 2005).
For myriad reasons it badly needs to maintain functioning relations with America.
"Up to now, this program has been functioning fairly badly because it is difficult to establish a correspondence between the skills of a doctoral researcher and an identified and limited need of a company," Forest says.
