2018 Mitsubishi outlander

It sounds like your door needs to be realigned. Check your bolts and hinges.

Try it with the window down or another door open. If the door closes easily, then you have a cabin that is air tight. Most cars have vents with rubber flaps that let air rush out when closing doors. Perhaps the area that has these vents is covered by blankets, plastic bags, tarp, or other objects.

Yes i just got my car. The trunk also doesn’t close well and the doors you have to slam