askchapo

You gotta add Dialectics

Firstly, the word 'dialectic' doesn't mean anything specific outside of context. At most, it carries the meaning of 'something related to change', and can refer to anything from people having an argument to a framework with theses, antitheses and syntheses of things. Do you refer exclusively to the dialectic of nature?
Secondly, that claim is yet to be substantiated. Why does one 'gotta' 'add' any particular dialectics?

Nothing "idealist" exists

Taken at face value, you are claiming that idealist schools of thought do not exist.
If you mean that non-material things do not exist, then you subscribe to a linguistic framework that, among other things, makes engaging with math without compromising on your principles basically impossible, and also means that things like capitalism, social relations in general, numbers, functions, logic (none of which consist of matter) exist.

Trying to make a definition of "materialism" which says human consciousness is simple cells, chemicals, and electric is a straw man of good materialist analyses

This seems rather silly. If defining terms is 'a straw man (of good materialist analyses)', then I'm sorry, but how do you expect to communicate what materialism and idealism are? If you actively refuse to explain what you mean by certain words that are not used in a colloquial manner, how do you expect other people to understand you? The same criticism I actually have of philosophers in general as well, as the entire field seems to be actively resistant to properly defining their terms and being understood with minimal ambiguity.

materialist analyses

Also, a pet peeve of mine is how 'materialist analysis' is almost always better characterised as 'political-economical analysis' in socialist spaces. In particular, my basis for the claim is that such analysis can be done just fine within idealist frameworks, but also because it never actually draws any conclusions from materialism - rather, such analyses draw conclusions from understanding of economic base and superstructure, understanding of private property, understanding of classes.

why they run into the same issues that Plekhanov ran into

What issues did Plekhanov run into?

Are you insinuating that Wittgenstein's position of linguistic disagreements is applicable to differences of idealism and materialism?

As I have stated, I have not investigated the matter as of yet.