If gaming isn't the primary focus, the 7800X3D isn't really a comparable part to the 14900KS. You should be looking at something like a 7950X or 7950X3D.
Between a 14900K(S) setup and a 7950X(3D) setup, budget is going matter quite a bit. The 14900K needs a lot more support hardware, but can also be faster.
Given what we know now in regards to the Intel 13th/14th gen issues, I could not possibly recommend Intel to anyone.
Someone who is completely manually tuning things shouldn't be too concerned about Intel feeding their board partners vague nonsense for default settings, or board partners pushing the bounds of sanity with auto/XMP settings, as almost none of that will be used.
I don't trust stock to be stable and when I'm done setting up a system, there is scarcely an 'auto' setting to be found anywhere. However, I don't want to assume this will be the case with the OP, and for more normal users, or even most enthusiasts, there is a lot of baggage to consider with the top Intel parts and the current state of board firmware.
AM5 suffers from a horrible IMC design
Debatable. Having the IMC on a separate chiplet increases latency and limits the useful bandwidth due having to cross an off die fabric link, but the IMC itself isn't really the issue.
True for Raphael, at least relative to Intel, but mostly irrelevant as fast RAM is only good for the ultimate performance it enables. In games a vcache part can generally match Intel despite a main memory performance deficit, and in many other tasks one might need all the resources of a 14900K for, memory performance is often not a bottleneck at all.
intel decimates am5 when overclocked
Highly subjective to workload.
False.
they both run hot when you do try and run them fast
True, but for very different reasons, which can be very relevant to one's budget. The rational budget ceiling for cooling a top LGA-1700 part is a about he price of the CPU. The rational budget ceiling for cooling most AM5 parts is $40.
the chiplet design renders the only useful cpu is the 8 core
Mostly false.
Raphael's inter-CCX latency is high, but this is not a significant problem for most tasks. The overwhelming majority of games do not benefit much from leveraging the second CCD and thus inter-CCX latency rarely comes into play, if the system is properly configured. The majority of highly-parallel content creation workloads (like the OP's video editing) do not have enough coherency overhead for inter-CCX latency to matter.
the motherboards are horrible
I wouldn't recommend many X670 boards as I consider essentially all of them to be rip offs, but there are plenty of solid B650 boards and a quality board for AM5 can be much less expensive than ones for LGA-1700, due in no small part to less need for a monstrous VRM.
Sometimes.
software works better for Intel like adobe and several others...
Unless an Intel specific feature (like QuickSync) is in play, or an AMD specific feature (like AVX-512 on the mainstream platforms, ironically enough) most software works the same, differentiated only by raw performance.
i can go on about memory compatibility problems, etc...
Memory compatibility problems are user error at this point.
Also with Intel everything just works nad doesnt cut out or give you a bsod, and software doesnt need to be patched or configured.
I don't expect everything to just work without configuration on either brand's platforms and any BSOD, without a demonstrably defective part, generally means whoever setup the system screwed something up.
Both Intel and AMD have issues where software doesn't always schedule itself properly without patching or configuring. This is a problem with all heterogenous and/or non-monolithic systems, especially when OS schedulers haven't fully caught up.
Atlas Fallen was a prime example of a title that had to be patched to work correctly on Intel's heterogenous parts. Intel's Thread Director itself needed OS
patches to function and still isn't flawless. AMD has similar problems getting CPPC to prioritize the right cores on their v-cache CCX in their 79x0X3D parts.
Ultimately, I am highly skeptical of the views of those who cannot be bothered to make sure both platforms are working correctly before trying to compare and contrast them.