Exclude values from Table B based on matching values in Table A, + extra condition between 2 values

#"Filter" = Table.SelectRows(#"Table B", each 
let
   rowA = #"Table A"{[item = [item]]}?,
   rowC = #"Table C"{[item = [item]]}?
in
   not (rowA <> null and rowA[email] = [email] and rowA[date] > [date]) and not (rowC <> null and rowC[email] = [email] and rowC[date] > [date])
)

Only works if [item] is unique in the tables. If performance is bad add Table.AddKey(PreviousStep, {"item"}, true) to the end (or middle) or your queries

Hi Anonymous 

This is the script for Table B

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjDWNzDUNzIwMlDSUXJSitUBChkiCblAhEyRhJyVYmMB", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [date = _t, item = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"date", type date}, {"item", type text}}),
    #"Filtered Rows" = Table.SelectRows(#"Changed Type", ( a ) => Table.RowCount( Table.SelectRows( #"Table A", ( b ) => b[item] = a[item] and b[date] < a[date] ) ) = 0 )
in
    #"Filtered Rows"