I rewatched/watched (I hadn’t seen a lot of the new ones) all of the Treehouse of Horror episodes from the Simpsons this month.
It was very fun at first but I was over it fast because almost all of the newer ones are really terrible.
My way of rating is quite generous.
So 8 and above was good and enjoyable for me. Everything 7,5 and under was pretty bad.
I would recommend Seasons 2 to 12 and surprisingly Season 21, which was a musical episode that I quite liked.

Season 2 – 8/10

Season 3 – 9/10
Season 4 – 9,5

Season 5 – 9,5

Season 6 – 10
Season 7 – 8,5

Season 8 – 10
Season 9 – 9,5
Season 10 – 8,5
Season 11 – 9
Season 12 – 9

Season 13 – 6,5
Season 14 – 7,5
Season 15 – 7
Season 16 – 7
Season 17 – 6,5
Season 18 – 7
Season 19 – 6
Season 20 – 7
Season 21 – 8
Season 22 – 7
Season 23 – 6,5
Season 24 – 6
Season 25 – 6
Season 26 – 6
Season 27 – 5
Season 28 – 5
Season 29 – 6
Season 30 – 6
Season 31 – 6,5
Season 32 – 5,5
Season 33 – 6
Season 34 – 6,5
Season 35 – 7
Season 36 – 7
Season 37 – 6,5
Season 38 – tbd (it’s gonna air this weekend)