It's been declared a failure by whom? If by others and you don't agree, ignore and keep pushing. If you can see that the design/architecture choices you have ma

It's been declared a failure by whom? If by others and you don't agree, ignore and keep pushing. If you can see that the design/architecture choices you have made are wrong you need to scrap it and start again based on what you know now. With the experience you and your team has gained you can probaby get back to where you are currently stalled pretty quickly and deliver a great solution. The better part of success is knowing correctly what you have to do, so now that you know having learned the hard way just do it. Having to admit you were wrong and wasted resources sucks, but it's better than doubling down on something you know isn't going to work, especially if it's important to the business in the long term.