Most regulations come about due to agency rulemaking under vague or broad statutes, so this implicit assumption is likely generally true.
Given that power, it doesn't surprise me that Republicans would be uncomfortable with organisations like 18F that had zero ideological diversity, in much the same way that I would expect Democrats to be uncomfortable inheriting an agency composed entirely of MAGA types.
Regardless of their technical prowess, as a government organisation, they should have taken more care to avoid becoming completely partisan, and shouldn't be surprised at this outcome.