Will a combo afci/gfci breaker solve my light switch neutral issue
You can't run cables &quot;in a loop&quot; like that
The root problem is in the way you have wired this.  The layout of the circuit describes a big circle (or possibly two circles), and you're just plucking the wires you want out of &quot;whatevah&quot; cable, as if this was DC wiring or something :)  It's not. AC behaves differently and you must follow different rules.
Code (NEC 300.3) requires your cabling to be in a &quot;tree&quot; topology, with unlimited branches but no loopbacks.   So you will need to modify the cable topolgy to be a tree by abandoning certain cables... and as necessary either change certain cables to /3, or change the smart switches to ones that can work without neutral.
The GFCI is &quot;keeping you honest&quot;, and you should not remove it. You should correct the wiring defects.
Correct:

This assumes proper cabling methods are being used. Part of the problem here is you are drawing a schematic which is generally not helpful in AC mains wiring.  We need to see a wiring diagram which shows routes.  Note that here, I have altered the schematic to look more like a wiring diagram.
Now you're playing with power
&quot;One of the great challenges in this world is knowing enough about a subject to think you're right, but not enough about the subject to know you're wrong&quot;.  - Neil Degrasse Tyson
That statement pretty much defines &quot;electronics types&quot; trying to do home wiring.
They are proud of their EE education and think that ought to make home wiring easy.   It's not.  You have to learn a whole new world that's all about stuff you are used to shining on: wiring methods, equipment certifications, route topology, and 1000 other rules.  And just the fact that AC power behaves differently in several aspects than friendly low-voltage DC.
This stuff makes the difference between a safe and unsafe installation.