"greatly disrupted" is a correct and usable phrase in written English.
It can typically be used in a sentence to describe something that has been disturbed or interrupted to a great degree. For example: "The train delays have greatly disrupted the morning commute for many commuters."
The educational system was greatly disrupted by the civil war that began in late 2013.
The three-year-old Palestinian uprising, and the tough Israeli military response, has greatly disrupted the regional economy.
Though Mr. Noordin has evaded capture over the years, the Indonesian authorities have greatly disrupted Jemaah Islamiyah's leadership.
Water supplies fed by alpine snows or ice sheets are already experiencing changes and could be greatly disrupted, it said.
First, they greatly disrupted the operations of the Saigon govt. Second, they succeeded in producing or increasing disunity between the Vietnamese & the Americans.
Perhaps this situation best demonstrates how a system's equilibrium can be greatly disrupted even if only one pathway is closed off.
Chemical functionalization decreases the crystalline content of MWCNTs, however, it did not greatly disrupt their structure.
Palestinians denounce it as land confiscation that is greatly disrupting their lives and complicating efforts to establish a Palestinian state.
It also created an authority meant to smoothly wind down even the largest institutions without greatly disrupting the financial system.
Palestinians denounce it as a land confiscation that would greatly disrupt the lives of many Palestinians and complicate efforts to establish a Palestinian state.
That greatly disrupts settled jurisprudence which, before today, applied the straightforward, bright-line test of volitional conduct directed at the copyrighted work.
