I still am at a loss

If we belong to a church that supposedly has suffered a complete apostasy from the true faith, how can you believe that we would receive anything other than condemnation from the Judgment Seat of Christ? Is Mormonism a completely relativist religion? I didn’t think it was.

If you believe that Christ’s “orginal” teaching was perverted and suppressed by the Church (and it would have to be the Catholic Church that did this, since it ws the ONLY form of Christianity until the Tenth Century (arguably the 16th century - if you consider the Orthodox to have retained just about everything), then it follows that you must believe that what we condsider to be the fruits of following that perverted doctrine can’t be good fruits, because they wouldn’t be based on anything that was revealed by God! Rather, it follows that you should believe that we would receive God’s rebuke for having led so many souls astray from the “truth” for just about all of the Christian era! Again, I don’t think you’re being entirely honest about what you believe.
This, however is all covered through the means of the Church. Along with your misguided doctrinal assertions in the first paragraph:
First, it would be impossible to be in the presence of God the Son and not be in the presence of also, God the Father and God the Holy Spirit because they are ONE.
Second, following the Bible’s teachings is not enough, becuase the Church came BEFORE the bible. If the early Christians wanted to pervert Christianity - why write a Bible at all? Truly if there had been an apostasy, the Bible as we know it wouldn’t exist, because it was compiled by the same people you claim deserted the faith! And yet the Bible is. If it contains the Truth - then the Church which promulgated it must also therefore contain the Truth.
Third, there is no marriage in heaven - that IS in the Bible. Mark 12:25 "25 For when they shall rise again from the dead, they shall neither marry, nor be married, but are as the angels in heaven. " It’s not the way WE want it to be, it is the way CHRIST SAID IT WOULD BE.
Fourth, as to being joint heirs with Christ, this refers to our attaining eternity in heaven with God, not becoming gods ourselves.
Fifth as for the “pre-mortal” life - there is none. The reference in the Jeremiah 1:5 " Before I formed thee in the bowels of thy mother, I knew thee: and before thou camest forth out of the womb, I sanctified thee, and made thee a prophet unto the nations." refers directly to Jeremiah himself. God knows ALL things, and knows about all creation even before he creates it. It doesn’t follow that because He knew any individual before he formed him in the womb that he formed him
outisde the womb before hand. There is nothing in scripture or any Christian teaching that supports this idea. The soul is created and infused at the moment of conception - not before.
As to God’s plan for those who did not hear His Word in this life - it is just that: God’s plan. Christ didn’t instruct anyone to do anything regarding those who did not have the ability to receive the Gospel. We must leave them to the infinite mercy, justice and love of God - for we know that He always does what is merciful, just and loving.