There are certain industries like airline (but also healthcare, telecom, etc) that just make a living out of screwing over consumers in any way possible.
It is so exhausting to deal with - I don't have the energy to dispute every single time a company pulls one of these stunts to fight for myself to get the baseline level of not being treated like trash. This is exactly what consumer protection agencies and regulations and other laws are meant to protect against, but these institutions are failing us daily.