I don’t see it that way at all.
In fact, Scripture is clear, imho, that the martyred saints STAND ALWAYS BEHOLDING GOD THE FATHER—ETERNALLY ALWAYS IN HIS DIRECT PRESENCE. That’s hardly bastard anything! That’s the extreme opposite of bastard anything.
Further note that Christians will endure the tribulation so that they may bring MORE people to Christ.
Then you've got the wrong book...
It is not just those that are Raptured that become the Bride of Christ...It includes all Christians who have passed on before them...
Those that were 'left behind', were left behind because they did not accept Jesus as their Saviour while they had the opportunity...If they accept Jesus as their Saviour during the Tribulation, they will not be bastards...They will not be part of the Bride of Christ...They will be friends of the Bride and Groom...They will make it to heaven, but not as the Bride...
Although there were many Christian martyrs in times past, I suspect most Christians thru-out history died of disease or bad health (old age) of one sort or another...They will be with us at the Rapture...
Wouldn’t they be the Bride of Christ when they finally receive him into their lives? They certainly had plenty of time before the tribulation period to receive Him. Maybe they had to learn the hard way?
Revelation 3 (all the following are from the KJV)
3 Remember therefore how thou hast received and heard, and hold fast, and repent. If therefore thou shalt not watch, I will come on thee as a thief, and thou shalt not know what hour I will come upon thee.
11 Behold, I come quickly: hold that fast which thou hast, that no man take thy crown.
15 Behold, I come as a thief. Blessed is he that watcheth, and keepeth his garments, lest he walk naked, and they see his shame.
7 Behold, I come quickly: blessed is he that keepeth the sayings of the prophecy of this book.
12 And, behold, I come quickly; and my reward is with me, to give every man according as his work shall be.
20 He which testifieth these things saith, Surely I come quickly. Amen. Even so, come, Lord Jesus.
You can't surprise the wicked if you take away the righteous first. Messiah is supposed to come quickly, like a thief in the night, so people are to repent, live righteously and be watchful, lest they be caught by surprise. If you remove the righteous first, the wicked are going to notice and not be surprised.