Sort by column values with multiple fields in rows in matrix

Hi, I need to display Country and Customer coming from different Dim tables and show them in rows in matrix visual. The field ( Product) in Columns in Matrix is from a different Dim table all connected to Fact table by one-to-many relationship.

The below measure works fine when I have either Country or Customer in rows, but as soon as I add both fields, the measure doesn't like it.
I need to basically highlight the minimum value for each Product column by using the below measure in Conditional formatting.
The measure I tried -

Background Measure =

VAR _1 = CALCULATETABLE(
ADDCOLUMNS
(SUMMARIZE('Fact','Dim Country'[Country], 'Dim Product'[Product]),
"@Amt", [Value]
),
ALLSELECTED(''Dim Product'[Product])
)
var MinValue = MINX(_1, [@Amt])
var MaxValue = MAXX(_1, [@Amt])
var CurrentValue = [Value]
var Result =
SWITCH(TRUE(),
CurrentValue = MinValue, 1,
CurrentValue = MaxValue, 2, BLANK())
RETURN Result

If I add Country to rows in matrix  and customer coming from Dim Customer[Customer] to the above measure in summarize, it does not give right result. It only works when I have one field say Country in rows and product in columns.Could someone guide on what I am doing wrong? I need the below output when both Country and Customer are in rows.