When the door is opened , into the horizantal , does it go past the 90* point . i.e does it actually slope downwards when fully opened –
If it does , then its probably the actual inner door itself thats bent and distorted . Check the two screw heads on the lower side , inner edge of the inner door panel . These screw into the hinges . Do these area’s of the inner door panel look bent ? This is where they normally deform if someone falls/steps onto the open door.
This would be my best guess without actually seeing the door physically