The phrase "as problematic a" is correct and usable in written English.
It is typically used in a construction that emphasizes the degree of the problem, often followed by a noun.
Example: "This is as problematic a situation as we have ever faced."
Alternatives: "as much of a problem as" or "as serious a issue as".
"We view the incident as problematic," a senior official said, "but we're wary of the possibility of unintended escalation".
"Some doctors don't seem to see the relationship … as problematic". A study of 4,000 physicians found that 96% received money from drug companies, and yet "the majority did not see it as a conflict of interest", he said.
Feminists regard the following conceptions of objectivity as problematic: (a) Subject/object dichotomy: what is really ("objectively") real exists independently of knowers.
In some sense, we have a non-wellfounded definition, which is as problematic as a contradiction (a proposition equivalent to its negation).
A perfect correlation would have been as problematic as a low one: it would imply that the international aid community does not change which would be a puzzling property for such a complex system.
Although imposter syndrome doesn't appear in the Diagnostic and Statistical Manual, the persistent feeling of not being good enough can be just as problematic as a diagnosable condition.
Is Taylor's shirt really as problematic as an entire clothing label named Porn Star?
There is nothing simple about inducting N.W.A; the group is as problematic as an act gets.
And almost every day, local papers have carried a new source of embarrassment, leading some to comment that Senator Kennedy may finally have a rival with a past as problematic as his own.
Overeating can be as problematic as undereating.
That really struck her as problematic.
