Weary , Why such an aggressive tone ?
Much of what you say is true, although forgetting to select a system on is not normally considered a reasonable criteria in evaluation.
Any aircraft resticted to operations below 25000 ft in europe, (especially in the winter) will experience problems, creating additional discomfort for pax and crew, and especially for turboprops reduced efficiency due ice accretion.
The main advantage the 150 seat Boeing or Airbus has is operational flexibilty.
You can operate short, medium or longer sector lengths, as close as Birmingham Belfast or as far as Athens.
The Jet can with 2 rotations of 5 crew carry up to 1200 pax per day. Labour costs must be maximised to achieve low fares.