Er13

Hello people, I'm pretty new into fishing and I just bought my first rod and reel combo. It is the lews carbon blue gt spinning rod and reel combo. However while I have been trying to fish the only thing limiting me from catching more fish is my casting distance. It seems whenever I try to cast the line just gets caught up in the air too much and the whole process is not smooth. Although I'm not entirely sure if my technique is perfect, I'm sure it has something to do with the reel or line. I have tried both 8 lb fluorocarbon and 10 lb monofilament but both have the same problem and I have tried re spooling them multiple times. After re spooling them the line seemed tight enough, and all the equipment seemed lined up as far as their specs, but it still has problems. Any suggestions as to what the problem could be and what I could do to fix it without buying a while new rod and reel?