Assess Lack of Geotextile Fabric and Proper Drainage

What happens here

The next critical error identified is the direct contact of soil with the backside of the retaining wall. The presenter explains that, in an ideal construction, a geotextile fabric should be placed behind the wall, extending up and around, to separate the soil from the drainage material. This wall lacked such a fabric, resulting in soil mixing with the intended drain stone, creating a mucky 'mud rock' condition.

Goal: Determine the absence of geotextile fabric and its impact on drainage.