no matter what i do i get gurgling, popping and liquid coming down.
If the coil is gurgling, popping and spitting you are flooding the coil.
Some Causes of flooded coils. juice
is too thin
Juice got hot and thinned out
Wattage too low and not vaporizing all the juice that the coil has wicked flooded coil - YouTube
Hard to understand how you are getting burnt coils and flooded coils at the same time. Flooded coils = too much juice, burnt coils = not enough juice.
Do you have a local B&M vape shop you can visit? You need someone to look at your vape and figure this out for you. If as you say you are doing everything right, all gear is in proper condition, you've assembled everything correctly, you've primed appropriately, etc... then this wouldn't be happening. Not across 3 different tanks at least, one tank sure but not 3. You are missing something we've tried to point out to you and you don't realize it.