"problematic accounts" is correct and usable in written English.
You could use it to refer to accounts which cause issues or are facing some kind of difficulty. For example, "The bank is dealing with a number of problematic accounts that need to be resolved."
Twitter has closed some problematic accounts, but others remain active.
Account closures: censors shut down problematic accounts entirely.
Twitter also culled what it said were millions of "problematic" accounts last July.
Despite making nearly $4bn a quarter in profits, it claims it can't track down problematic accounts.
It has introduced new machine learning software to monitor account behavior and is suspending over a million problematic accounts a day.
Lawyers for Mr. Ashcroft's firm said all the problematic accounts had been excised, even though it meant losing nearly $30 million a year in interest and fees.
For outsiders, this problematic accounting is deeply worrying.
American officials say they are examining whether there are problematic Account 98 funds held at Samba.
In its settlement with Monsanto, the S.E.C. said the problematic accounting began in 2009 and continued through 2011.
The White House is saying — clearly, for the first time — that Trump did indeed know Flynn had offered a problematic account of his contacts with the Russian ambassador to the FBI.
In his autobiography, "Memories, Dreams, Reflections" (itself a problematic account compiled by followers seeking to sanitize Jung's earthier side), Jung describes having felt as if he were split into two selves: No. 1, a powerless little boy; and No. 2, a prominent 18th-century gentleman, complete with buckled shoes and powdered wig.
