Whataburger here in Texas is good.
Yes, Whataburger, in and out, Jack in the box... but I don’t call them national chains, because they are not really nation wide, but regional..
There are basically 4 quick service burger chains that are national in the US.
McD’s, BK, Wendy’s and Hardee’s/Carl’s JR.
The others are regional.
The last time I was in a Whataburger, the burger flipper dug deep down the backside of his pants for a long scratch. That was over a decade ago. Never again.