The phrase "a less rewarding" is correct and usable in written English.
It can be used when comparing the level of reward or satisfaction of one thing to another, indicating that it provides a lower level of reward.
Example: "While the project was interesting, it turned out to be a less rewarding experience than I had anticipated."
Alternatives: "not as fulfilling" or "a more disappointing".
Mr. Marshall said student-staff ratios at Australian universities had ballooned in recent years, leaving students with a less rewarding classroom experience.
Both terms connote a less rewarding and more onerous environment in which to live, even if you are feeling oppressed by your homework and your tests or by your political pressures or gargantuan departmental workload.
However, the general consensus is that diesels no longer deserve their old reputation for offering a less rewarding driving experience and growling like a Rottweiler with a sore throat; in fact, some would argue modern diesels make for a nicer drive than their petrol rivals.
Although I would have felt much the poorer for not having seen the Amsterdam-Salzburg production, experiencing it without benefit of visuals is a less rewarding proposition.
It is likely that this species is dug out for food by humans, but its small, dispersed colonies in firm soil suggests that it is a less rewarding target than the densely packed sandbank nests of species such as the African river martin and rosy bee-eater.
And 41percentt of all respondents ― a category that includes parents and non-parents alike ― said somebody in their family had passed up a promotion, chosen a less rewarding job or forgone an opportunity for education and training because of child care issues.
(This latter offer appeared to work out to one free ride in every 15, so a little less rewarding than Payment Rewards).
Fortunately (and, perhaps, not coincidently) my job was turning out to be a lot less rewarding than I had hoped and expected.
Ironically, that very same year Lennon and McCartney had considered a far less rewarding offer during the April 24 , 1976 episode of Saturday Night Live.
In the same fashion, drug discovery is facing an even less rewarding reality as few originally promising products eventually pass the standards demanded for approval after long clinical trials.
Such sentimentality "involves the wilful neglect of various aspects of the target of the emotion that would necessitate a more complex and less rewarding response; a false intensity of experience is gained by ignoring any features that militate against the simple, one-sided response which typically idealises, glamorises or romanticises the target, making it tug at the heartstrings".
