This scene is just below the window sill image presented above.
Painting over tons of Excrements was futile!
There has been a poor attempt at painting over the blackened wall and baseboards.
While Bed Bugs are not social insects and do not make large social nests, when there is a multitude of them, then, their presence feels like that you have arrived inside of their nest.
We see several hundreds of dead Bed Bugs on the carpet. There is also Diatomaceous Earth dust on the carpet. Painting and Diatomaceous Earth would cause some discomfort to Bed Bugs but these efforts are fruitless.