re: What is something “easy” to cook that you struggle with?

I've never used eggs or breadcrumbs in burgers. It sounds like you may be putting too many ingredients in the meat for burgers. Try forming your burgers without overworking the meat. Just grab a chunk of burger meat and form the burger. Season on the outsides and then cook. I prefer just salt and pepper, but occasionally some other dry seasoning. I might give the burgers a little hit of Lea and Perrins once they've started to cook.