Slow growth; cynical

I feel like my growth has been very slow at Amazon despite the high growth stories about the company. I have been working on my last project for 2+ years and without launching there is no data to support my growth. I have thought hard about why we haven’t launched and also solicited feedback from peers, managers, senior engineers, and they all say that for business reasons these things happen all the time. For this reason I don’t think it is engineering competence holding the project back. I am looking to grow both technically, as a leader, develop a strategic decision making mindset, and obviously get promoted. Feeling very cynical about broken promises, never ending dangling carrot. Meanwhile I look all around me on other teams, orgs, other companies, and projects get launched and delivered in 3-6 months and people get promoted and placed in leadership positions much faster. Case in point; new grad to E5-E6 at Facebook in 5-6 years. I’ve worked with many SDE3s and I feel like some got lucky delivering some smaller projects that were much easier wins than my current one. Some others were solid but it was about 50:50. I try to say this objectively as I reviewed design docs and their code. Obviously I don’t have the full picture but this is just my assessment based on 2 pizza team size, scope, complexity, depth of projects. Am I just slow/not as talented as others or am I handicapping myself by working on someone else’s vision that has changed 3-4 times in the past year? I don’t think delivery of actual software is a problem for me or my team because I ask for feedback and I get told that by my manager and team mates including SDE3s. Feeling like I’m wasting some of the best years of my career building stuff for uninspiring leaders. TC: 220k