No.

Colt had the TDP for a long time and made some of their guns...the 6920 being the chief example...to the TDP's spec. This means it's a pretty damn good quality rifle. It's not a guaranteed sub-MOA gun (then again, the ammo it was designed to be used with wasn't sub-MOA either) that came from the factory pretty durable and functional. All the little shit is done pretty well. Bolts typically don't crack within a few thousand rounds, the gun doesn't have functional issues because the gas port is out of spec, the materials are quality so you don't have problems like premature gas port erosion, the fire control parts don't give up the ghost early, the pins don't walk.  Shit that's supposed to be properly staked is actually properly staked. Etc.

Colt made commercial market stuff other than the 6920, of course, that wasn't bad as far as function, but they often did it so that mil-spec parts wouldn't work. Which a lot of people found rather annoying. But for the most part Colt just kept making M4 style weapons without really innovating.

In the meantime, lots of other manufacturers popped up offering more options. Back in the day Colt was vastly superior to everyone else on the market as competitors (Bushmaster, for instance) couldn't reliably crank out rifles that worked. I bought a Bushmaster back in those days and mine works great, but I've seen shitloads of others that don't. And that was pre-Cerberus. I'm sure it's damn near abysmal now.

The delta between Colt's flagship offering and other options on the market has closed a lot just in the last 10 or so years. Companies have innovated and gotten damn good at making components. Faxxon, for instance, makes lightweight barrels that don't suffer from the zero shift problems pencil barrels originally had. You can get one with a mid-length gas system. They are nitrided which makes them a little cheaper to manufacture, but they still deliver accuracy and service life equal to (or in some cases better than) chrome lined barrels. Etc.

Colt didn't even release a mid-length gun until the CCU...and that seems to have been a limited run. The guns they are selling now with the Centurion rail seem to have the carbine length gas system. Nothing wrong with that, of course, as it works...but the mid-length is a little bit nicer in terms of controlling the gun in rapid fire.

The M4A1 appears to have significant upgrades most especially using a barrel which delivers a higher level of accuracy than that achieved by the M4. But, as I mentioned, they aren't the only company capable of doing that. I've seen very, very accurate Faxxon barrels. I have a Sionics gun that is a legit sub MOA gun with MK262 ammo. (Which, unlike most people who say that on the internet, I actually have witnesses that can confirm)

Colt isn't bad quality. They're pretty darn good quality. But they aren't the only game in town anymore.

They are stuck with the UAW, which lots of people don't like, and they have a history of not really innovating to the same extent as other players in a now much more crowded market.

This.

I can't fathom how Colt could produce a handul of iconic weapons, one of which helped win the west, the 1911...around since the First World War up to and including the GWOT, two plus variants garnered once huge mil contracts and saw us through a few more conflicts and spawned the AR genre, the Python and Anaconda, and still be TU.

Ditto.

Thanks for putting things in perspective.

The anaconda I owned was full of sintered metal parts. Poorly made ones at that. That revolver was a flaming pile of shit.