I've not been particularly offended by anything you have said up to now but your comment about 'youngsters' really is offensive.
Not intentional, I can assure you and I noticed the last poster's age, but quite a few younger people in the UK will not listen to advice from elders these days. The one's that do learn a lot. We do have experience and knowledge to pass on.
Then IB so this is all nothing to do with allocated seating or the email you received the truth is you have a long running issue with the airline, maybe if you had said so people would have understood better.
Yet they are the airline I prefer to use before Monarch and Jet2.
However, no one at easyJet appears to listen to criticism of existing practices. They could well use a "mystery passenger" on flight to report on cabin crew performance and assessments from managers/training managers on flights.