I don't think Rand is lying or hiding something.

He wants to break the seals, because he is realistically looking at the state of the world and has reached the inevitable conclusion: right now, the world barely stands a chance, and every day that passes, the Shadow weakens it more. Rand feels he's taken too long to reach his epiphany. If he wants the world to even stand a chance, he has to precipitate the LB right now. If he waits and dither, as he was forced to do in the WOS, the world is doomed.

He told Nynaeve so much, after witnessing a chunk of reality in Tear simply vanishing.... Rand knows he's already reached the point in the war not when he tried to get his plan accepted and Latra opposed it, but the time when LTT decided he could wait anymore and went forward without women, because the Shadow was about to win and dithering meant losing, whereas his plan gave the world a chance.

The pivotal point is the decision to wait one more month. Rand's logic would make him break the seals right now... but he doesn't yet have the solution to seal the Bore. That's why he's waiting. He's given himself one more month to come up with something, and trusts that he will, that Min will find something etc.. He's given Egwene and the world a month to prepare for TG at the same time.

One more month... that's what Rand has judged the world can sustain before he has no choice but to break the seals and trust to faith in the Wheel and the Creator's wisdom if he has not come up with a viable plan by then. Having no plan yet wouldn't matter then, as Rand judges if they wait more than a month, it will be too late, the Pattern and the forces of the Light will be to weak to win without a miracle.

I wouldn't trust the bit from LTT's memories about the Creator abandoning the world. That doesn't fit with what the Forsaken have said about LTT reeking of piety, for one thing. That could be LTT on a bad day, a moment where he lost faith and despaired, and believed that Elan Morin might have it half right. Or that might also be LTT's memories "tainted" by Moridin, as this paragraph fitted like a glove what we know of Elan Morin's beliefs. Rand almost quoted his theory about the Pattern being a prison of misery for the souls before his epiphany on DM. Elan Morin got named the Destroyer of Hope for good reasons.

Post-DM Rand/LTT is a very different man, and his faith in the Creator seems very strong. You cannot believe in your role as the Creator's champion, gain a metaphysical understanding of your purpose as a ta'veren, have faith in the Pattern and at the same time believe the Creator cares nothing for Creation and has moved on... The Wheel and the Pattern, ta'veren, the champion... a man of faith wouldn't fear the Creator doesn't care... he knows he does, he's the living proof that the Creator cares, and took a hand in the fight. Rand himself is his Hand in this fight. There are even some signs that Rand has possibly become something like the Creator's Shaidar Haran.