The phrase "are hardly suitable" is correct and usable in written English.
It can be used to express that something is not appropriate or fitting for a particular purpose or situation.
Example: "The proposed solutions are hardly suitable for addressing the complex issues we face."
Alternatives: "are barely appropriate" or "are not really fitting."
Consequently, these approaches are hardly suitable for diagnostic and empirical perturbation purposes.
It is late autumn and the administrative capital of Crimea has been overrun, not by holidaymakers – the season and political climate are hardly suitable – but by Russian officials.
Although Magnetic Resonance Imaging (MRI) can assess bone micro-architecture parameters in-vivo, high-field whole body MRI scanners are hardly suitable for wide-scale screening campaigns.
Keeping in mind that medical domain-experts are required to be deeply involved into the process of medical knowledge discovery [5], the known process models are hardly suitable.
"Going up the stairs, your shoulders would brush the walls". The layout was hardly suitable for children.
It suggests the downside of all that maverick brio is a recklessness that is hardly suitable in a commander-in-chief.
Some cartoons have pointed out that these gifts were hardly suitable for a baby, or even for his mother ("Three wise men, and no one brought chocolate?" Mary fumes in one).
Qatar doesn't have much of a history of organized sport; it has hardly any stadiums; and the temperatures there reach a hundred and twenty degrees Fahrenheit in the summer, which is hardly suitable for running around a large field for ninety minutes.
But what worked for an infantry battalion riding in thirty-ton Bradleys is hardly suitable for light-armor vehicles, which can be destroyed by the Soviet-made rocket-propelled grenades that are common in every back-alley hot spot in the world.
The Spenserian air of amused detachment is hardly suitable, though, for this story about an assortment of women having emotional breakdowns because of troubled relationships, and when Sunny tries to be her own woman, she either freezes up or goes to pieces.
