Do you know and understand about the Catholic Faith? We Catholics or Roman Catholic respect all church believe.
Is like you and all others only have problems with the Roman Catholic, And you said Coptic Catholic was founded by St. Mark? St. Mark was the disciple of Jesus. Jesus our Lord did not gave him the authority to founded any church. Jesus gave the authority to St. Peter which was the first Pope.
On the other hand, we are proud to be Catholic because is full. And all the teaching in the Church are true. No picking and choosing.
Sorry, that you are one of those who dislike our Lord's One, True and Holy Apostolic Church. Those who love Christ do and did lay down their lives. Not just Coptic Catholic Orthodox.
God bless you Alinalotte.