in this world some are naturally better at somethings than other education has nothing to do with it. If your brain has tendency only to handle logical things and what you have done with your entire life is solving problems you naturally becomes better at them so your trait define it you are someone that think. So you are suited for something like engineering

if you are a social person lived among friends and all your friends listen to you and you have a way with talking it always the path of marketing since your brain is tune to that sort of things

if you are a person that take decisions when needed and have capacity of negotiating with people and make them listen to you and you done all of this in your entire life you brain is tune to that sort of things so, your trait will define like manager

it is how your brain tune and how it handle task define how good you are at preform that task not how much you are educated of that task

so if you are a social person that has the ability to make people buy what ever things you tell, you are good at marketing and if you are not a thinker and you can't grasp things easy and you try to study engineering you will pass the exams well because exams are from what you study but real world does not give problems that you study at class, it gives you new one new challenges

with out the ability and capacity your brain could not coop with it. so you can not think for possible solution. you fail

it was not your fallt or you are inferior you just chosen the path that not meant to you that is all

so choose your path wisely when you make a decision because you do it for life

do not choose education and try to match skills to it, rather choose a education that match your skills and you will succeed.