The fact that Jesus warned those in Judea to flee to the mountains, proves that he's referring to a local event, not a world wide event. And the fact that he said "when you see Jerusalem surrounded by armies, know that the end is near" tells us that he was referring not to the end of the world, but the end of something local, or perhaps spiritual. And the fact that Jesus said "some of you standing here will not see death before I come again" proves that he came again in the first century. I'm not sure what "hand waving" needs to occur to understand these things.
As for the worst time in history, you must not have read the Wars of the Jews by Flavius Josephus. Did you know that tens of thousands of corpses laid unburied and rotting in the streets, and that mothers resorted to eating their own babies?
I don't think that proves preterism. Jerusalem could still flea to the mountains in the 7 years of tribulation. That doesn't offer compelling proof of a reference to AD 70. In fact, most scholars believe John wrote Revelation during the rein of Domitian in AD 95, because it fits history better than John being on Patmos in the rein of Nero. 25 years AFTER the destruction of Jerusalem, so that puts the preterism point of view to bed in one act alone. Also, Jerusalem still exists today, so it did not meet its end in AD 70. Isreael became a nation again in 1948 and is alive and well today. Those who were standing here will not see death before I come again could have been taking about after his resurrection or meeting Paul on the road to Damascus after He ascended to heaven. I did read the wars Josephus and a lot worse has happened to a lot more people, specifically Jews. Millions died by gas chambers in the holocaust, probably thousands of times as many were even alive at the destruction of Jerusalem in AD70 and the Nazis were much crueler than the Romans. Ever see Schinder's List?
When did mountains jump into the ocean? When was Israel destroyed with a flood? When did 100 pound blocks of hail rein down on the earth? When did all this happen worldwide and not just to Israel, as Scripture clearly states by saying 1/4 of the world's inhabitants will die (not 1/4 of Israel) and it also clearly affects every nation, every tongue, every tribe, not just Israel.
Of all the views of Revelaton, I find Preterism to be the LEAST credible and LEAST likely. It hinges on the almost the whole book of Revelation being symbolic, it relies on only a couple of words like "near" in the description of when these things would unfold, and it relies on John being in Patmos at a time that most biblical historians and secular historians think is wrong. Plus many events in Revelation have never occurred before in the history of the planet. And to interpret as such means nothing worse could ever happen again, and worst has certainly happened since AD 70. I know the sacking of Jerusalem was horrible, but trying to suggest that was worst that what the Nazi's did in the holocaust to the Jews (like experimenting on Jewish boys to see how many bullets in the head they could take before they would drop dead and other forms of torture too evil to list here, and what the coming antichrist is going to do in the future, just doesn't make pass mustard. Preterism relies on so many unfounded assumptions that Occam's razor says its the least likely explanation.
Preterism, at least so far, seems to be a "easy way out" type of interpretation. We can pretend all the bad stuff is behind us and that only the final second coming is ahead if we pretend it has already passed. But history speaks otherwise, as does Scripture, and it preterism is built upon far too many questionnable assumptions and interpretations of things as symbolic when inconvenient to the preterist point of view. Sure, a few things fit, but its more like 5% of Revelation, and the other 95% leaves such as gap in the story that it makes preterism seem more like a fantasy of those wishing to get off easy and not have to accept that tribulation and hard times are to come. When did every creature in heaven, on the earth, and under the earth all praise the Lord all at once in AD70 worldwide? All animals, all creatures, all angels? But look where we are now with COVID-19, world-wide hunger, wars and rumors of wars, a recent Hamas attack on Israel, alligators and global warming, the threat of nuclear armageddon on multiple fronts such as China, Russia, North Korea, Iran, and others who aspire to attack and destroy the United States and Israel.