'less critically' is correct and usable in written English.
It is usually used to refer to something that is not judged as harshly as something else, or to qualify how serious a situation or problem is. For example: "The situation is less critically serious than we initially thought."
It has been a tough couple of weeks for Broadway's less critically praised shows.
In recent years, however, he has made an awful lot of what would politely be described as less critically acclaimed films.
New backstage equipment has also been installed; it, too, must be tested, and no less critically, the theater's technical crew must learn how to use it.
The impulse to marry the force of rock with advanced technique brought about many variations, including some less critically popular acts, like the mock-classical Emerson, Lake & Palmer.
The combination muffles the rage in her work, obscures the clarity of her evolution and dilutes or skirts her less popular and less critically chewed-over series.
The budget is an intimidating $200m, but Pixar has yet to have a true commercial failure – even with less critically fawned-over works such as Cars and Monsters University.
The Bowie show, conversely, delves deep into his film and theater work, even some of his less critically-acclaimed, fully-realized works and the music videos and live performances were interwoven throughout the show.
The first, "Scarlett," by Alexandra Ripley, published in 1991, has sold more than six million copies to date worldwide but was less than critically acclaimed.
All this buzz is both titillating and frustrating, stoking our appetite for a body of work that we're unable to read, much less assess critically: imagine what the name Homer would mean to Western civilization if all we had of the Iliad and the Odyssey was their reputations and, say, ninety lines of each poem.
A large population-based study conducted in Canada demonstrated that older women with critical illness were less likely than critically ill men to be admitted to an ICU 26.
The presence of a trauma surgeon during patient resuscitations is required at most American College of Surgeons verified trauma centers despite little evidence showing improved patient outcomes in the less-than-critically injured (Tier 2) trauma patients.
