That's an excellent set of principles, but something I suspect is very difficult indeed to apply in practice; I can think of unending examples of bad criticism - even, or especially, when there are strong criticicisms to be made - but I am struggling to think of any good example where, to use your analogy, the critic has something to say about a work that's outside his 'preferred genre' and even outside his personal preferences, but good in terms of the genre that it's in and a good film to recommend to its intended audience.

Or, indeed, a bad 'film' and a negative review, in the terms of the genre and the audience, rather than a specialist fan-base of Swedish art-house hipsters or Laurel & Hardy obsessives.

Feel free to start the ball rolling with (say) a critique of Visual Basic for Applications, in terms of what it's for and who will use it, rather than complaining that it isn't C++ or Ruby.