DHS is one thing, but make no mistake most government agencies outside DoD have seen resources cut and leadership with explicit tasks to water down, remove, and erode the performance of duties. See: DoE, the EPA (where leaders wanted the agency shut down) and number of “acting” leaders right now as a percentage. This is explicit and has happened rapidly since 2017.
The other thread of the creeping problems in the West - that it is growth of government rather than decay of government - has some evidence to show here.
Institutional IQ isn't the issue. The DHS was never clever and the FBI has been a corrupt mess for a long time. See also J. Edgar Hoover and imagine him as a current president.
[0] https://en.wikipedia.org/wiki/United_States_Department_of_Ho...