First , i dont think you're ever alone whatever is your opinion. If you have an opinion regarding something , its very probable that someone shares the same opinion
I also dont think the trilogy is perfect , because its a concept very hard to achieve . Perfection is something immaculate , which is something difficult to present in movies (and with all the subjectivity that art carries).
But regarding the content , i dont agree with you. I actually think its the other way around. The Dark Knight Rises put this trilogy at a level that completely transcends the other movies. It brings a closure to the story , consolidating the strong aspects of the previous movies , and at the same time it puts the story , thematically and emotionally , at a whole other level. The biggest compliment i can say to Rises is that it not only capitalizes of the strong foundations it had , it makes them even better.