In a nutshell, most d4 players hate openings they don't face a lot like Dutch and most even myself are caught off-guard despite studying the opening.
D4 players: Which response u hate the most to play against? (Poll)

The King's Indian Defense gives me the most trouble.
I don't "hate" to play against it, though. I enjoy the challenge. But I do find it the most difficult to beat, especially when it's in the hands of an experienced player.

Benko can be annoying if you accept gambit and mix up your preparation.
I have a study on the Benko Gambit. The author recommends the f3 line and provides sample games

Do share the results, It will help me to make the most annoying opening repertoire out there
That's why I chose French against e4. - White needs to know 8 variations to play best. most choose the Advanced var [it sucks more than a vaccuum cleaner - I almost always win] or they play the very g_y "Exchange Variation" - winning on time, because I fall asleep at once. - they never play main lines. besides, it's fun - solid, and you attack at once, so...
Against d4, very hard to choose, indeed.

Benko can be annoying if you accept gambit and mix up your preparation.
I have a study on the Benko Gambit. The author recommends the f3 line and provides sample games
I just took a look now. man, you're so, serious, I had no idea. nice to meet you sir.

Do share the results, It will help me to make the most annoying opening repertoire out there
That's why I chose French against e4. - White needs to know 8 variations to play best. most choose the Advanced var [it sucks more than a vaccuum cleaner - I almost always win] or they play the very g_y "Exchange Variation" - winning on time, because I fall asleep at once. - they never play main lines. besides, it's fun - solid, and you attack at once, so...
Against d4, very hard to choose, indeed.
Can relate as a French player. However, if they play 2.Nf3, I play 2...c5 transposing into a Sicilian because they like to exchange the pawn. Also, I need to have a backup just in case they either play a boring variation, or a variation I have no clue how to beat.
With the Advanced, I like to blay the ...Bd7 line instead of ...Qf6 and on Chess.com, people keep making the mistake of Bg5 which almost never happens on Lichess

However, if they play 2.Nf3, I play 2...c5 transposing into a Sicilian because they like to exchange the pawn. Also, I need to have a backup just in case they either play a boring variation, or a variation I have no clue how to beat.
Me too - transposing to sicilian, but they got wise - they play a delayed alapin. any idea what to do?
"With the Advanced, I like to blay the ...Bd7 line instead of ...Qf6 and on Chess.com, people keep making the mistake of Bg5 which almost never happens on Lichess"
Very interesting, I remember GM Finegold mentioned that, never gave it a chance... you say practically it's better?
Plz share opinion

However, if they play 2.Nf3, I play 2...c5 transposing into a Sicilian because they like to exchange the pawn. Also, I need to have a backup just in case they either play a boring variation, or a variation I have no clue how to beat.
Me too - transposing to sicilian, but they got wise - they play a delayed alapin. any idea what to do?
"With the Advanced, I like to blay the ...Bd7 line instead of ...Qf6 and on Chess.com, people keep making the mistake of Bg5 which almost never happens on Lichess"
Very interesting, I remember GM Finegold mentioned that, never gave it a chance... you say practically it's better?
Plz share opinion
I got you.
This is what I play. It's the same two moves in a regular Alapin
Also, I made a typo in one of my posts and I will show I diagram to correct it

ROFLMAO! Only d-pawn players should answer - How laughable!
There is a reason I don't play d4, and it's because my most hated opening in all of chess (Black or White) is a d4-opening! No wonder why I play 1.e4 and 1.b4!
That hated d4-opening that I refuse to play from either side is the Grunfeld Defense!

I don't play much d4 but curious to know the answer, it'd be nice if you share the results
Only d4 players please, later i will do one to e4 players
https://docs.google.com/forms/d/e/1FAIpQLSckovwRF2xA-YLZ_dlzt5fLRiAjpn1Kfs-mRRAiefcvl1Hb2Q/viewform?usp=sf_link
I'll post the results here when I'm done