Are you having "informational interviews"? Asking a engineer to coffee or for a 20 minute phone call, while scary, has the largest return on investment of any type of outreach I've seen. Basically your have to build out your network and then keep in touch with that network until one of those people have a role you would be good for.

Also you shouldn't expect companies to give you feedback. While its nice when companies do many avoid it for a number of reasons. The biggest issue I saw in the past was if specific feedback was given say, "You didn't implement x correctly in y problem" it opens the door to candidates responding with, "Yes I did" or arguing. I'm not saying that you would do that but it only has to happen once or twice for a manager to stop giving feedback.