I think you have about three problems you are lumping into a general statement. Here is how I like to think about these things
CRM is not Project Management.
Project Management is not Task Management.
I am a single person worker with less interfaces than you appear to have but let me outline what I do and what just does not work for me.
First I have yet to find a CRM that actually works the way I want it. I use the Apple calendar and contacts system and I do not want to have that information anywhere else or isolated in some paid service. To the best of my knowledge there are no CRM systems that work that way.
For project management there are more ways managing projects that I can think of and I have tried a lot of them. I keep coming back to a couple of systems. When I interact with others I use Trello. It works every where and “most” folks get the 3x5 card methodology. On a big screen you can see it pretty well. Now if you need a real timeline or gaant chart then mabye ominplan is just the right thing to use. IT is the cost of doing business.
For “projects” that are mine or sort of step by step I use omnifocus. I mostly follow a GTD methodology. The new version is getting more interesting. OF can also assign tasks to folks. IT might make a good core for you. Step back and think about it.
I use AnyList to share items with a few folks. Shopping with my wife is one if the best uses I have for it.
SOOOOOO
Where are we? The Omnigroup makes great software that works across the Apple device spectrum is is valuable and they get paid for their software. I really like it.
Trello is a great tool that is free and a nice metafor back to 3x5 cards
I am not paying a monthly fee except for iCloud that keeps everything in sync. I keep all my data in my echo system. I only have to trust a couple of vendors to be there when I need them
I stopped looking for tools a couple of years ago. IT killed my productivity. Sometimes a “working” system is more important than a “perfect” system
The smaller number of tools you use the better off you will be.
What does not work…
I do not review often enough; I really have to work to keep my system running; it takes effort. I fall down every week. I miss stuff. That is on me, not the tools.
I do not study what the tools can do for me enough to ensure that I am using them to their fullest potential.