Peter, you do know that Corinth was not in the Roman province of Asia, right? So what St. Paul writes to Corinth about what he has taught them is not related to the people in the churches of Asia turning away from him, since they were completely different places and populations.
And Asia was not actually that large. It is not comparable in size nor directly related to what we call "Asia" today. Check it out:
Here is Corinth, for comparison:
As you can tell by the fact that you can see Ephesus, the 'capital'l of Asia, in the map showing Corinth above (look to the right; the name cuts off, but is clearly visible), you should conclude if you are being honest that these passages, even if you do relate them because your Mormon faith requires you to in order to claim its 'great apostasy' theory, aren't talking about some giant area. They are across the Aegean Sea from one another, but not
really far away. While they didn't have cars back then, the driving distance is apparently
only 99 miles, which makes me think that the sailing distance could be even less (since it's a straighter -- if not
straight -- shot).
I don't want to understate it, because I'm sure in the ancient world it would've been quite a trek, but my point is that it is not this vast area containing so many people as it might seem when you first hear or read "Asia". It is not talking about a giant geographical area as that term is today.
And anyway, the second epistle to Timothy was, of course, written to Timothy, who was a disciple of St. Paul himself, so as to strengthen him in his own evangelistic works, not as evidence of some kind of 'apostasy'. Such was never witnessed by the early Church, and cannot be found in its writings but by the eisegesis (reading
into scripture) of the self-interested who need it to be there for their own reasons (*COUGH COUGH*).
From
the third homily on Second Timothy by our father St. John Chrysostom:
Then he describes his trials and temptations, not to depress his disciple, but to elevate him, that if he should ever fall into the same, he may not think it strange, when he looks back and remembers what things happened to his Teacher. What then says he? Since it was probable that Timothy might be apprehended, and be deserted, and be relieved by no friendly attention, or influence, or assistance, but be abandoned even by his friends and the faithful themselves, hear what he says,
"This you know, that all they which are in Asia be turned away from me." It seems that there were then in Rome many persons from the regions of Asia.
"But no one stood by me," he says, no one acknowledged me, all were alienated. And observe the philosophy of his soul. He only mentions their conduct, he does not curse them, but he praises him that showed kindness to him, and invokes a thousand blessings upon him, without any curse on them.
"Of whom is Phygellus and Hermogenes. The Lord give mercy to the house of Onesiphorus, for he oft refreshed me, and was not ashamed of my chain. But, when he was in Rome, he sought me out diligently and found me." Observe how he everywhere speaks of the shame, and not of the danger, lest Timothy should be alarmed. And yet it was a thing that was full of peril. For he gave offense to Nero by making friends with one of his prisoners. But when he was in Rome, he says, he not only did not shun intercourse with me, but
"sought me out very diligently, and found me."
So, to prepare St. Timothy for the alienation he was likely to experience as an evangelist, his father St. Paul reminds him that he himself experienced the same from all the people of Asia (see above map), but there were also still some who did not shun him, but actually sought him out.
In short, there is no apostasy here or in the other passages you have improperly invoked.