Hi, SyCarl,
Let me start off by saying this is a tricky thread …

To the best of my knowledge, there is nothing in the teachings of the Catholic Church that is contrary to the Bible.
In my opinion, however, Scripture is sometimes crystal clear - and other times … well… vague would be an upgrade…

But, that is only if one is reading Scripture with the idea that everything is there - AND - everything is complete. The first item is a non-starter … there are numerous omisssions - and this is the way God intended it.
Look at John 21:25 “There are also many other things that Jesus did, but if these were to be described individually, I do not think the whole world would contain the books that would be written.”
Christ’s Second Coming has not yet happened - the entire Book of Revelations - is a future event. So, we certainly can not judge these things as of yet.
My problem with Catholic teaching is that, while it might not be against Scripture, some is not well supported by Scripture. To someone who accepts Tradition as a valid basis for doctrine that doesn’t present a problem.
Now, if we are going to take on an issue like Canonized Saints - by looking in Scripture, we are not going to succeed. And, I guess the issue here (and why I think this is tricky…) is that first there was a Church (Catholic) and then there was the New Testament. The completed OT existed before the Incarmation.
If we really believe what Christ said when He gave Peter the Keys to the Kingdom ((Matt 16:18-19) “And so I say to you, you are Peter, and upon this rock I will build my church, and the gates of the netherworld shall not prevail against it. I will give you the keys to the kingdom of heaven. Whatever you bind on earth shall be bound in heaven; and whatever you loose on earth shall be loosed in heaven.”) then the issue is really settled.
My understanding is that the Chruch was looking for role models that we could follow. Certain individuals demonstrated exceptional piety, devotion, courage, patience, etc. that if we immitated their example we would become closer to Christ. Admittedly, some of the early saints (e.g., during the persecutions by the Roman Emperors) did not have the type of clear histories we would have liked to see - but, you work with what you have, and try to improve as you go on.
What is imporant is that if the Church declares a person to be a Saint, it would be wrong for someone to believe that that particular Saint was no saint at all and that this person is in Hell! We do not have devotions to ever canonized Saint - but, there is nothing to prohibit such a practice.
There is nothing in the Bible that prohibits the Chruch from declaring a certain person to be in Heaven. Christ gave the authority to Peter and his successors to run the orgaization as he and his successors saw best - and the guidance of the Holy Spirit would keep the Chruch from error. Declared Saints have a long history in the Catholic Church - and this should indicate that the Holy Spirit has no objection.
So, SyCal, if you have a biblical problem because canonized Saints are not specifically authorized in the Bible, I would say this is legitimate - because it is not there…

But, does it have to be? I do not think so. The Bible and the Church work together. The Bible is static in the sense that the Canon is closed. The Chruch is dynamic in the sense that it is the living Bride of Christ. How the Church and Bible cooperate is all part of God’s Plan for our Salvation. And, truly, that is the Good News
God bless