I studied BEng in Aeronautical Systems Engineering. Like you, I was disappointed at the lack of the aeronautical side to the course. As you are in your 1st year, your course shares a lot with the other engineering courses. From your second year, you begin to have specialist modules. Although these courses are more design and theory based. More mathematical. There has been some new courses in Leeds/Salford where "Pilot Studies" are included. Maybe switching to a course of this nature is more what you are looking for. Would be better preparation for the ATPLs than "Gaussian Elimination!!" The course will get MUCH harder, and you need to apply yourself now to ensure you are on top of the work.
If you are having doubts as to whether you should stick it out or not, it depends on how you approach it. If you will do well, and have the determination to succeed, carry on. (These are good traits that they like to see in interviews). The choice of course doesnt have to be engineering.
It may also be worth mentioning that Qatar Airways' recent scheme has "preference for those with tertiary education especially in Science or Engineering".
At he very least make sure you have a plan B if the flying doesnt work out due to some situation in the future which is out of your hands.
Best of luck though
