It does indeed look bad for them...
And yet, I still leave theological room.. After knowing He's the God that came amongst us and shocked the system of theology, I acknowledge that only He has the full plan. He does love to surprise us in ways we didn't see coming after all...
Hey there. Look at that passage again in context please? It does not say Jesus went on an evangelism tour.
1 Peter 3:18-19 KJV
For Christ also hath once suffered for sins, the just for the unjust, that he might bring us to God, being put to death in the flesh, but quickened by the Spirit: [19] By which also he went and preached unto the spirits in prison;
Diagram the sentence if you will, but by which did he preach to the spirits in prison? What does the verse actually state?
A) by being put to death in the flesh
B) by descending into the bottomless pit
C) by his quickening by the spirit
D) by an awesome revival message that he gave while he was dead
"Preached" does not mean "attempt to convert" but rather "proclaimed." The correct answer is C, by his quickening by the spirit. B and D may be popular myth but aren't in the scripture at all!
So what did Jesus proclaim by his quickening by the spirit? His revival declared that He was indeed the Son of God and that the victory was His. Had he not been raised the host of devils would have won... And you know that is what they were hoping for.
Did he pay those spirits in prison a special personal visit later? Cannot say for certain just from that passage, could be. But the "by which he preached" includes and requires that he was first raised.
I am inclined to think that the fallen angels are entirely beyond redemption but I wouldn't presume to say that for certain. The Bible does promise the final demise of Satan but doesn't give specific names past that.