From Wikipedia about the county flags:
Liberia is subdivided into 15 counties, each of which is entitled to its own flag. Each county flag bears the national flag of Liberia in the canton. The county flags are flown at regional offices and together encircling the national flag of Liberia at the Executive Mansion.
The flags were introduced in 1965 by William Tubman for the purpose of promoting the counties as meaningful entities. Their design was inspired by Liberia's quilting tradition.
The flags have been the subject of widespread ridicule by members of online vexillology communities on social media platforms such as Reddit and Facebook. However, vexillologist Steven A. Knowlton argues that these discussions demonstrate a lack of understanding of the political and cultural context of the flags and of the material construction of flags from textiles as opposed to digital creation.
The article "Liberian County Flags in Historical and Cultural Context" by Steven A. Knowlton.
On the other hand, most flags designs are culturally inherited from European and Asian medieval traditions. If some other people elsewhere don't give a shit about these (see also the Nunavut flag), good for them.