so this is what i have observed of your photos and based on my experience.
- make sure you have good airflow. keep the air intake open full till you get your desired temp and dial down.
- get a charcoal basket. i got a cheap metal basket for 9.99 from homegoods and used that as mine. i find this helps b/c it keep the coals in one area or i can move then around if i need to. having them roll around the firebox isnt good.
- make sure you have your exhaust open full. no blockage.
- you didnt post photos of your charcoal. maybe you arent using enough to heat up the entire chamber.
- make sure you have good airflow. keep the air intake open full till you get your desired temp and dial down.
- get a charcoal basket. i got a cheap metal basket for 9.99 from homegoods and used that as mine. i find this helps b/c it keep the coals in one area or i can move then around if i need to. having them roll around the firebox isnt good.
- make sure you have your exhaust open full. no blockage.
- you didnt post photos of your charcoal. maybe you arent using enough to heat up the entire chamber.