Kudos for honestly acknowledging your insecurities, and not angrily lashing out at Amazon. If you really feel that DevOps is a dead-end career choice, I hope you consider a lateral move to a different ladder, such as the SW-Dev ladder. As someone who made a similar transition a few years ago, I know how scary and difficult it must seem, and how much it hurts to go from a senior role to a junior role. But speaking as someone who's now a few years into my new role, I cannot recommend it highly enough. The long term benefits easily outweigh any short term switching costs.