When I feel like this about my poetry, it is often because I find I am writing what I think is poetic rather than what is true. Most readers can feel this but often are unsure what the feeling is other than a disconnection from the piece. I find poetry that goes against this from poets whose main focus is an image and serving that image with poetry as a vehicle rather than poetry as poetry. My personal recommendations would be Marianne Moore, Lucille Clifton, Elizabeth Bishop, Carlos Drummond de Andrade, Tagore, Gwen Brooks. ( I have a bias to these styles and period, there may be better suggestions)