Halloween II is the superior sequel and deserves to be part of the canon
I know John Carpenter stated that he needed beer to get through writing it and Jamie Lee Curtis referred to it as a "turkey", but it really is the only one of the sequels that feels true to the spirit of the original and feels like it takes place in the same universe. Yes, it has more gore to it, but to me, gore is like a spice, it can be used to give a slasher movie a real flavor boost if not overused.
Halloween H20 is also the better revenge film (with the painful exception of Michael's mask, which is is just atrocious and resembles a bad Party City knock-off).
In closing, Halloween (2018) is a solid sequel that I probably see in theaters again, and definitely, purchase on home video. But I feel like the other two movies deserve a little more love and respect than they've gotten in the past.