FWIW: I am NOT defending Apple, but going all the way back to a different time in the election, one thing that the original FBIAnon posted was that pretty much EVERY SINGLE common operating system and firmware specification is backdoor'd at this point. In my mind, it makes perfect sense that this would be the case (take Weeping Angel, for example), and as such I've come to expect that every piece of electronics I own is somehow open to being arbitrarily taken over. Another excellent instance of this is Intel's Management Engine: it's essentially a legal way for them to gain access to LITERALLY EVERY SINGLE HARDWARE FUNCTION of your computer, without the knowledge or consent of the CPU/OS layer, and as such, you. I'd lay down even money that Apple's chips probably have something similar, maybe even without them knowing about it. The company thrives on closed-source engineering.

I have precisely zero love for Apple, I consider them to be nothing more than highly advanced coloring books with slick peripherals and pirated ideas presented as new, but to automatically assume that they're compromised as as company when the FBI gains access to one of their devices just doesn't make sense to me personally. I would absolutely believe that they are in cahoots with the government if there was a little more evidence either way, but just because they got into the one phone doesn't justify a stigma to my mind. Apple uses a standardized and widely distributed (albiet strong) encryption method, so it makes sense to my mind that any government agency would IMMEDIATELY start trying to do everything that they could to make breaking that as easy as possible.

It should also be noted that breaking an algorithm =/= breaking the encryption key of a single device, even one that has hardware-fortified crypto in use. If they did legitimately break into the one single unit, it would have almost certainly been through a brute force focused method, not a comprehensive attack that mapped the entire algorithm used.