Computers and gaming consoles produce heat when they're in use. There isn't anything you can do about that (except not use them). As @hotaru.hino states, what you can try to do is manage the air flow in the room where your PC is located. My computer room is pretty small as well and I tend to keep the ceiling fan pulling air up all year round. I also have a box fan near the room entry bringing cooler air into the room.
The problem isn't the PC, it's your room not getting enough ventilation and airflow. Switching to a PS5 isn't going to make a difference either, as those consume about as much power as a midrange desktop PC or a high end gaming laptop.
Computers and gaming consoles produce heat when they're in use. There isn't anything you can do about that (except not use them). As @hotaru.hino states, what you can try to do is manage the air flow in the room where your PC is located. My computer room is pretty small as well and I tend to keep the ceiling fan pulling air up all year round. I also have a box fan near the room entry bringing cooler air into the room.