I'm not sure it's worth discussing any of this with you since you seem pretty determined to dislike this, but what the hell, I'll give it a shot:
This episode is enigmatically bad.
Was that a typo? What does 'enigmatically bad' mean? Was it supposed to be 'epically'?
Why are the Time Lords afraid of it, especially considering that EVERYTHING ELSE IN THE UNIVERSE WANTS THEM DEAD?!
Yes, but the Time Lords are pretty confident they can handle everything else in the universe. They know they are badass, so the only thing that could really threaten them is something that IS them. Which is pretty much true - the Doctor has 'stood in the ruins of Gallifrey' several times over.
Do we even know who the hell the Hybrid is at the end? Honestly, I loved the rumored idea that Oswin from Asylum was the one, cause that'd be great twist way to end the Clara run and all that.
How would that possibly make more sense than what we actually got? Oswin never got anywhere near Gallifrey or knew what a Time Lord was. At least this conclusion actually used the characters who were already established as part of the story.
BUT FUCK THAT! Lets make the Doctor irrationally agonizing over Clara for NO good reason. Suddenly she means so much more than every other companion he's ever had? Just awful.
Well, she is the one who voluntarily split herself into infinite parts just to protect him, with no expectations of her own survival. She is the one who persuaded him not to give up and find a way to not destroy his own planet. She is the one who persuaded the Time Lords to give him more regenerations when he thought he was out of them. She is the one who told him that being afraid was okay when he was a scared little kid. She is the one who stuck by him through what was probably one of the more traumatic regenerations he ever had, given the whole 'new cycle' thing. She is the one who pushed him to greater extremes of action than most.
You may complain about Moffat loading too much 'special snowflake' stuff onto one character, but you can't possibly claim that this came out of nowhere. Given all of the above, it only makes sense that the Doctor would have more of a connection to this one woman than some of the others who just happened to be along for the ride without really contributing anything but who he just kept around to have someone he could impress.
bring Gallifrey back, and not explain how Missy got away, how Gallifrey escaped, HOW they were able to communicate via the crack in Time and how they magically managed to send him regenerations? Honestly, I was fully expecting all of those, but nothing.
Well, I would have liked some of that too, but it's not over yet. We have time. And as for 'how', well the Doctor said it himself: "Short answer - Time Lords are clever." Honestly, what answer would have satisfied you? Would you rather spend 15 minutes explaining all the technobabble of Time Lord technology, or would you rather get on with the story?
Also, to me, the whole Me sub-story was the most vacuus, time-wasting, pointless, going-nowhere story arc that never went N.O.W.H.E.R.E. Just fucking terrible.
Not my favourite storyline the show has ever done either, mostly because I was singularly unimpressed with Maisie Williams' acting. But I think part of it was another misdirect - create a character who superficially was the Doctor's perfect companion to replace Clara, since we all knew she was leaving... but then twist it so that she actually became Clara's companion instead.
.