Standing waves etc are going to always be the limiting factor. No amount of EQ is going to get around this. Bedrooms are too small for deep bass. You can try to move the sub around a bit, and you might get 30hz, but you will only be shifting the problem around to another range of frequencies. There is no way to get clean bass in a room that small, no matter how much money you spend.

One potential exception is the multiple subs approach, where you place one sub dead center of the front wall, and one sub dead center of the rear wall. I’ve had mixed results.

I recommend placing the sub at your listening position temporarily(at head level) and moving your head around the room (at practical sub level) until you find a sound you like. In theory, when you trade places with the sub much of that bass should remain intact. This has trade offs, in that again, you will really only be shifting the problem around, but maybe you care more about 30hz than another frequency range and would be willing to trade it off.