The 3 sins of physicalism
(1) Contradicts the principle of Ontological Monism:
According to QFT & the principle of ontological monism, reality consists exclusively of a single, continuous foundational layer. The unobserved universe (the Noumenon) is not a container filled with physical "stuff". But a continuous relational matrix or a network of mathematical fields where a physical entity is strictly an excitation (a temporary fluctuation in data value) of that field. Matter, energy, space and time are epistemic emergent.
The human brain is a computational structure evolved for millions of yrs to survive and reproduce. Now because the noumenon is a structurally complete mathematical graph the brain lacks the thermodynamic capacity to process the entire noumenon at once. It runs an a priori compression algorithm to render a low-resolution 3D reality. For instance it process noumenon sequentially along the thermodynamic gradient or slope. Which results in the perception of time. Space is a measure of causal isolation (or the degree of entanglement) of the relational nodes of the graph. The stronger the entanglement the less the perceived "distance". Some field excitations behave according to the Pauli exclusion principle which results in the perception of "solidity". Others, such as photons, do not.
Thus every single aspect of physical reality boils down to physical fields interacting. And that "physical substance" is merely a low-resolution biological summary of mathematical data exchanges which the material foundation upon which physicalism rests.
(2) Reification Fallacy:
The principle of "Causal Closure" assumes that cause and effect is an ontic reality (an objective mechanical tether operating in the unobserved universe). But it, too, is an epistemic emergence.
(3) Fallacy of Misplaced Concreteness:
The physicalist assumes that the "laws of physics" are prescriptive command codes;;invisible rules that exist independently and force physical matter to obey them. But scientific laws are strictly descriptive. They are homomorphic maps;; extremely compressed mathematical translations generated by the human brain that discard intrinsic content but preserve relational structure of physical reality. The unobserved universe does not compute algebra, consult equations nor "obey" gravity. The Noumenon simply expresses its intrinsic structural symmetries. The "laws of physics" exist exclusively within the biological simulation (the Phenomenon) as tools for navigation.
Which is why physicalism doesn't resolve the "hard problem of consciousness" because it relies on the outdated classical physics where matter is dead & becomes a paradox of how dead "stuff" generates "consciousness".