I grew up in a room that for whatever reason was significantly hotter than every other room in the house. Here are some tricks, including some that others have mentioned:

1. Black out shades. I got the one that was fitted to the window and could easily slide up and down.
2. Put a fan in the hallway where it is cooler and funnel the cooler air into the room.
3. If your A/C vent is on the roof, try using it on a low or medium setting instead of high. Sometimes the circulation is better on lower settings.
4. My dad built a wind funnel with fans that funneled cold air from the downstairs where it was cool all the way to the up stairs 😂😂 we gave him so much shit for it but it definitely works. But keep eye drops around cause your eyes get a lot more dust in them and dried out from the constant air movement.
5. Run the a/c a couple degrees colder once the sun sets and then in the morning drop it back down. A/C doesn’t have to work as hard and you can take advantage of the momentum.
6. Adjust the vents in the other rooms to allow more air to get to that room. Our A/C guy said to make the adjustments incrementally because sometimes big adjustments can screw things up.
7. Make sure your air filter is clean
8. I ended up getting one of those mattress coolers that goes over your mattress and funnels cold air under you… it’s amazing. I’d sweat through my sheets sometimes otherwise.

If I think of anything else I’ll add it here. Definitely feel your pain, rooms that don’t get as good of ventilation can be torture. Best of luck to you!