1) Elendil is looking pretty good for someone who is -1519 years old.
2) The rings of power were forged over a 100 year period(SA 1500-1600), not a few months like the show is portraying.
3) Tar-Surion and Tar-Telperien were the kings of Numenor during that 100 year period, not Mirel/Pharazon who didn't take power until the year SA 3255.
4) Gil-Galad did not have the authority to order Galadriel to Valinor.
5) Galadriel not being Galadriel. She wasn't a bloodthirsty warrior. Like ever. The show is a massive misportrayal of her.
6) The Numenoreans are misportrayed as an ordinary, superstitious peoples, rather than the High Men that they were.
7) The Istari don't come to Middle Earth until around 1100 years into the third age. There are no wizards around to be in this show.
8) Elves don't need the rings of power to have the senses, visions and precognitions the series is putting forth.
9) The idiotic premise that elves need mithril to stay alive in Middle Earth.

10) They completely re-wrote Finrod's death in order to give Galadriel the need for revenge on Sauron. They didn't need to make that silly change in order for Galadriel to have a reason to oppose Annatar(Sauron).
11) Her magical powers have been stripped away from Galadriel for the series.
12) They made Galadriel a widow, except we know that she never was. She never lost her husband.
13) The turned Elrond into a beauracratic putz, rather than the accomplished, wizened leader/healer that he was at the ripe age of 1800 years.
The timeline is borked beyond repair. I'm also certain that if I rewatched season 1, I'd come up with many more glaring errors that I can't remember just now.