Dejection: An Ode and This Lime-Tree Bower My Prison

After discussing "This Lime-Tree Bower My Prison" at length on Tuesday, I found "Dejection: An Ode" to be really interesting because it was Coleridge being able to find nothing beneficial in his misfortune. In the first poem, yes, Coleridge is definitely immature in his handling of the situation, but in the end, he feels better about himself. After having milk burn your foot, that's all you can really ask for. In "Dejection: An Ode" Coleridge just laments and complains and cannot find anything positive about his situation. He can't even try to imagination a way that it gets better other than being with someone else.
I wondered what the difference was between the two events that made it so impossible for him to find something positive out of his experience. In "This Lime-Tree Bower My Prison" Coleridge makes the garden around him into a completely new experience, realizing that he needed to discover that he could make his own nature walk in something so close to home. He used his imagination to make discoveries about the world that he wouldn't have found had he had the opportunity to be with his friends on their walk. In "Dejection: An Ode" he talks about how he is at Nature's mercy. In the first poem, he was able to work with it using his imagination, but in the second poem, he has no control over it at all. Nature appears to have taken away the power of his imagination. This struck me because it seemed to me that Coleridge saw nature and imagination as intertwined in a more positive light than the conclusion he comes to in "Dejection: An Ode". He really seems to be despondent and he seems like he's given up hope in nature. I kept looking for him to believe that nature, and the natural oder of the world, and that those things would allow something to work out in his favor, but instead, he seemed to end with less hope, wishing the woman the best, but knowing there was nothing positive coming his way.