"Jesus Christ is the Same Yesterday and Today and For Ever" (Hebrews 13:8)

That's correct, Roman Catholics have sadly deviated and innovated. You should attend your closest Orthodox church and expedience a Divine Liturgy.

Holy Tradition is that same faith which Christ taught to the Apostles and which they gave to their disciples, preserved in the whole Church and especially in its leadership through Apostolic Succession. https://orthodoxwiki.org/Holy_Tradition