1st point: I believe that Christ is not in the Eucharist.
Luke 22:19: And when He had taken some bread and given thanks, He broke it and gave it to them saying "this is My body which is given for you; do this in remembrance of Me."
Communion is meant to be a remembrance of Christ and his sacrifice for us, we are not meant to injest Him.
From the book "World Religions Made Easy" by Mark Water:
"Roman Catholics believe that God, through the priest, miraculously transforms the bread and wine of the Lord's Supper into Christ's real body. This means that at every mass Jesus is sacrificed all over again."
If Christ is sacrificed over and over again, then His death on the cross is meaningless, if He has to be sacrificed over and over. He died once, for all of us.
The Catholic Church does not teach she is under the influence of evil spirits anymore than anyone who has not accepted the grace of God, just as Protestant and other Christian denominations teach.
The thing is: she IS under the influence of evil spirits. We all are. Satan is EVIL, and he tries to influence us every single second of our lives beginning at birth and ending at death.
Repentance is a required part of confessing of sins as we are directed to do in John 20:23
John 20:23 Whose soever sins ye remit, they are remitted unto them; and whose soever sins ye retain, they are retained.
Anything can be taken out of context and misconstrued to fit what you are trying to prove, but if you read that passage in its context, He is speaking to His diciples, not to us, and not to priests. God ALONE forgives sins. Confession to Christ is what is necessary. Confession to a priest does nothing. Man does not have the power to forgive.
Acts 13:38: "Therefore, my brothers, I want you to know that through Jesus the forgiveness of sins is proclaimed to you. "
My advice to you is not to buy into their hatred and prejudice and at least find a reputable source before you start criticizing anothers beliefs without really understanding them.
My advice to YOU is to read the Holy Bible, you know, the one God dictated.