I think this is a really good way of putting it. I think it's also important to realize that you may go through stages of feeling like this fairly frequently. It's when you don't do something about it (often because you feel like you can't), that it gets to be a problem.

The conversation "I want to do more / I want to do better. Here are the things that are in my way", feels a bit awkward at first, but in reality it is music to a manager's ears -- especially if your manager has been thinking, "What's going on with Joe? I really expect more from him." Often they are afraid to broach the subject because they don't want to put pressure on you and potentially make things worse.

Removing roadblocks so that people can do their work really well is the job of a manager. I think that many people don't realize this and as a result don't take advantage of/empower their managers. Often people view their manager as an impediment to work around (or simply as the gatekeeper to getting a higher salary).

Even if things are going well, I recommend that people get into the habit of saying, "I want to improve X, but I'm having difficulty because of Y" (even if Y is, "I don't know what to do"). See how your manager reacts and whether or not they can help you (directly or indirectly). A good manager is worth a lot!