Don't even know if there is a word for this. Person A let's down Person B constantly. The reasons are always valid on the surface ie illness, bad back, unexpected bill, overtime, but they don't tell B until the last minute to cause maximum disruption and are things that can't be proved and make B look unreasonable to doubt or reject them.
I know this is similar to gaslighting but is there a more specific term? Even as I'm writing this it seems like I'm over reacting!
Sorry for the garble - heads fucked