I allow you your beliefs. I am of the opinion that the Bible strongly teaches of a priesthood of ALL believers and does not specify any particular denomination or Christian group as being being superior or closer to God than any other group. The term 'catholic' (little 'c') is interpreted as the wholeness of the Church, that is all who know of and believe in the salvation of Jesus the Christ. There is caution/admonition for all to beware of false prophets, false teachers, or those who presume to have the whole truth and nobody else does.
I believe all Christians, all Christian congregations, all Christian denominations/orders/groups have elements of truth in their beliefs, dogma, doctrine, catechisms, teaching, theology, probably some a lot more than others. I also believe that no Christian or Christian group being made up of imperfect human beings--all have sinned and fallen short--is not without error no matter what its beliefs, dogma, doctrine, etc.