Power Bi columns

See the working here - Open a blank query - Home - Advanced Editor - Remove everything from there and paste the below code to test

let
    Query1 = Table1,
    #"Unpivoted Columns" = Table.UnpivotOtherColumns(Query1, {}, "Column1", "Value"),
    #"Filtered Rows" = Table.SelectRows(#"Unpivoted Columns", each ([Value] = "Complete")),
    #"Grouped Rows" = Table.Group(#"Filtered Rows", {"Column1"}, {{"countCol", each Table.RowCount(_), Int64.Type}})
in
    #"Grouped Rows"

Another way

let
    Query1 = Table1,
    #"Demoted Headers" = Table.DemoteHeaders(Query1),
    #"Transposed Table" = Table.Transpose(#"Demoted Headers"),
    #"Added Custom" = Table.AddColumn(#"Transposed Table", "countCol", each List.Count(List.Select(Record.ToList(_),each _ = "Complete"))),
    #"Removed Columns" = Table.RemoveColumns(#"Added Custom",{"Column2", "Column3", "Column4"})
in
    #"Removed Columns"