I don't mean to diminish any of your achievements. Shipping amazing products is orthogonal to creating a robust codebase/system.

I also don't mean to be negative towards you or your experience. Instead, I'll pose the question to you: What would you call a team/system that describes itself as "at risk of being crippled by a single line change like adding a metric"?

At the end of the day, the product is the only thing that matters and you can be and should be proud of the products you've launched. That said, are you proud of the way you and your team built them? Have you or anyone on your team proclaimed it was a joy to build/improve that product?

idk... after all I'm just some guy on the internet. Best of wishes to you! I truly hope you did not, do not, and never do work on a dysfunctional team/system.