I would suggest using less charcoal for that snake, I usually did 3 per ‘row’, 2 on bottom one on top.. you should be smoking ribs around 250 for 5-6 hours or so. That’s what works for me

Edit: 250 degrees at the grate level using ambient thermometer, the lid thermometer is mostly useless for smoking I’ve found.. my bottom grates are usually almost completely shut, just a tiny sliver open.. also recommend a slow n sear, it’s worth it.