The phrase "actively undermines" is correct and usable in written English.
It can be used to describe actions or behaviors that intentionally weaken or damage something, such as a person's authority, a system, or an organization.
Example: "His constant criticism of the project actively undermines the team's morale and productivity."
Alternatives: "deliberately sabotages" or "systematically weakens".
It goes in and out of countries quickly; it doesn't build mutualistic social networks – in fact, it actively undermines them".
As Darwin knew, when individual and group interests diverge, competition not only fails to promote the common good, it also actively undermines it.
But the next president is a man who actively undermines trust in journalism and roots for the demise of major publications.
It actively undermines a sector that has been hardest hit since the Brexit Referendum and will be thoroughly unwelcome for the 33 million consumers of the nation's most popular alcoholic drink.
"It actively undermines a sector that has been hardest hit since the Brexit referendum and will be thoroughly unwelcome for the 33 million consumers of the nation's most popular alcoholic drink," said the association's chief executive, Miles Beale.
… It beggars belief that the President of our closest ally doesn't see that his support of this extremist group actively undermines the values of tolerance and diversity that makes Britain so great.
Speaking before the 25th anniversary of the invention of the world wide web, Lane Fox also criticised the activity of US and UK security services as working to actively undermine encryption tools.
There are serious questions about whether some of his activities may violate the so-called Neutrality Act, which bars private citizens from actively undermining a foreign government.
But Prokopi actively undermined legitimate palaeontology.
But the government is now actively undermining progress.
And it is actively undermining the investigation of that aggression.
