Mahathir’s Pakatan Harapan coalition won a stunning election victory in May 2018, ending the previous government’s more than 60-year rule.
But his administration has since been criticized for failing to deliver on promised reforms and protecting the rights of majority ethnic Malay Muslims.
Of 1,204 survey respondents, 46 percent felt that the “country was headed in the wrong direction”, up from 24 percent in August 2018, the Merdeka Center said in a statement. Just 39 percent said they approved of the ruling government.
High living costs remained the top most concern among Malaysians, with just 40 percent satisfied with the government’s management of the economy, the survey showed.
It also showed mixed responses to Pakatan Harapan’s proposed reforms.
Some 69 percent opposed plans to abolish the death penalty, while respondents were sharply divided over proposals to lower the minimum voting age to 18, or to implement a sugar tax.
“In our opinion, the results appear to indicate a public that favors the status quo, and thus requires a robust and coordinated advocacy efforts in order to garner their acceptance of new measures,” Merdeka Center said.
The survey also found 23 percent of Malaysians were concerned over ethnic and religious matters.
Some groups representing Malays have expressed fear that affirmative-action policies favoring them in business, education and housing could be taken away and criticized the appointments of non-Muslims to key government posts.
Last November, the government reversed its pledge to ratify a UN convention against racial discrimination, after a backlash from Malay groups.
Earlier this month, Pakatan Harapan suffered its third successive loss in local elections since taking power, which has been seen as a further sign of waning public support.
Despite the decline, most Malaysians - 67 percent - agreed that Mahathir’s government should be given more time to fulfill its election promises, Merdeka Center said.
This included a majority of Malay voters who were largely more critical of the new administration, it added.