Thank God, Jesus doesn't agree with you and offers salvation to all, tax-collectors, prostitutes, and many others that would be judged as already 'lost' ... How tragic that the 'Pharisees' running this particular parish have now grouped the 'children of the not regularily attending' in the same 'lost' category.
Everyone who purposefully does not attend Mass will be lost forever.
Jesus will not give salvation to those who do not know Him or the Father, and Catholics will not discover Him apart from the Mass. He has give us His word on this.