The boarding process was completely disorganized, adding avoidable stress, and the airline's business model is tight spaces, but seats that recline more to make sleep easier in economy. The passenger behind us did not understand that and shook our chair saying we're reclining too much. We immediately brought the flight attendants in to mediate and deescalate the situation, and they didn't. The passenger behind us kept harassing my wife throughout the 8 hour flight. They should be better trained in this regard if this is the airline's business model and promise to passengers like us who review leg space and reclining angles before purchasing a fare on the airline.