Well, I can finally see the pics. That IS a small grill. It looks like a firebox, but there’s nothing wrong with that. I’m not hating. In fact, one of my grills is a Smokey Joe, Weber’s smallest, and it’s great for cooking for two people. A half chicken on that thing is perfect, as well are two steaks 6 burgers, etc, etc, etc.
The only thing I did see wrong is there is no charcoal grate in the bottom of it. Probably designed that way (as opposed to having been lost), but I’d change that ASAP. It’s one of the reasons you lost heat this time around…..without good airflow, the coals choked and died out.
They probably don’t make a grate for this rig, but you can improvise by getting a cheap Gas Grill cooking grate (a cheap one) and putting it in there. Those are rectangular and should work nicely if you shop around and find the right size. If you’ve got a cutting wheel for your drill, then it doesn’t matter what size you get since you can customize it!
A grate in the bottom will lift the charcoal off the floor and allow that lower air vent to bring in air under the charcoal where it will then rise and fan the coals. With the charcoal laying on the floor like that, the air just swirls around the charcoal, and worse, gets heated and rises above the coals and doesn’t fan them.
One of the biggest flaws with the old ECBs was that they just threw the coals into a closed pan (basically a water pan) with no ventilation and no clearance from the floor. A mod that added ventilation and raised the coals off the floor drastically changed the way those things cooked.
If you’re going to use this particular grill much, give some serious thought to modifying it with a lower charcoal grate to get your coals off the floor. You will see an amazing difference in performance!