GOTY DLC Won't Work In Game

Please read everything before responding, especially EA employees.

I previously played this game through EA Play. Then I bought the GOTY version which has all 15 DLCs. But none of the DLCs are working. There is no option to choose custom difficulty options when doing a new game. There is no war table operations regarding the DLCs like Black Emporium, etc. It's like I'm just playing the vanilla game even though everything is downloaded and installed and checked.

I already reinstalled both the game and Origin multiple times.

I tried repairing the game.

I tried starting them in Admin mode.

I made sure the DLCs' boxes are ticked in "Manage my DLCs" section in Steam.

I made sure I'm connected to the Origin servers (I can access Dragonagekeep and Multiplayer).

Also, this problem occurs when people are gifted the game. No one gifted the game to me, I bought it myself, before anyone asks.

I've read many threads here about the exact problem I'm having. I tried their "fixes" as best as I could.

Almost all of them played this game through EA Play and then bought the GOTY version, which seems to be broken, though I don't know why there is no definite fix to this problem.

I unlinked and relinked my Steam account to my EA account, as suggested by one of the threads.

I contacted EA Help, as suggested by one of the threads. They couldn't help me. I will go more into that.

I inquired about removing the game from my account and gifting me another copy of the game, as suggested by one of the threads. EA Help ignored my request during a case.

I contacted EA customer service multiple times through Live Chat and sending tickets (My Cases).

I feel like I'm talking to a wall whenever I talk to them. They offer no help and talk like an artificial intelligence, offering regular troubleshooting like verification, repairing, updating, etc.

I've been trying to solve this issue for a week now. Please stop recommending EA Help or giving me auto-generated responses like updating my drivers or repairing the game.

Thanks.

(cm edit - updated  title)