When trying to patch, it says "Reversed (or previously applied) patch detected!" (IR3 has been downloaded from this website). Any option I pick from there causes the "1 out of 1 hunk FAILED" message to appear. Then, Factorio itself doesn't recognize the mod as 2.0 proper and refuses to enable it. Using "--keep" command is irrelevant.

What Factorio returns after attempting to turn on the mod:

"Failed to load mods: IndustrialRevolution3/code/gui/gui.lua:33: attempt to index field 'filter_group_button_tab' (a nil value)
stack traceback:
IndustrialRevolution3/code/gui/gui.lua:33: in main chunk
[C]: in function 'require'
IndustrialRevolution3/data.lua:79: in main chunk"

If you can't get the patcher to work, you'll need to edit the mod and delete the offending line. The code should look like this near Line 33:

if data.raw["gui-style"]["default"]["filter_group_tab"] then
        data.raw["gui-style"]["default"]["filter_group_tab"].minimal_width = 48
        data.raw["gui-style"]["default"]["filter_group_tab"].height = 64
        local bx = 52
        local by = 52
        local spacing = 24
        data.raw["utility-constants"]["default"].select_group_row_count = 8
    data.raw["utility-constants"]["default"].select_slot_row_count = DIR.slot_row_count or 10
    -- data.raw["utility-constants"]["default"].inventory_width = 12
end

EDIT: You may have more success with the WSL method. If that doesn't work, I can only suspect that some file is not downloaded correctly.

Apart from that, I have no idea why the patching is inconsistent for some users, sorry.