No, Apple isn't falling behind, they simply do not care about the professionals. They're not in that market anymore, they've left it many years ago, especially when they've started to kill off all of pro apps, hardware (xserve), etc and removed "computer" from their trademarks.
They're a mass consumer fashion product company and the pros is a very small market share that they could care less about. I don't blame them for wanting to go for the profits lately.
You are not going to be happy with Apple again, the 90s/early 2000s Apple is not coming back, it's gone for good and unfortunately, the only person that could revive it is dead as well.
You want powerful and more flexible software, go give Windows or Linux a try depending on your needs. You'll find that Windows 10 is less worse than it was back then.