I'll add my two cents. First off, FlySky and Spektrum are both good TX's, they just have their pluses and minuses. I don't have much hands on experience with FlySky while I have been a Spektrum user for a few years. Here's some pros and cons.
FlySky Pros-
cheap to buy
receivers are cheap
very good for new hobbyists
FlySky Cons-
gimbals feel cheap
setup is not very intuitive
virtually no customer service (
@Hai-Lee corrected me on this)
feels light and not as high of quality
Spektrum Pros-
very intuitive to use
gimbals feel good and high quality
awesome customer support
ergonomics are very good, feels very quality
Spektrum Cons-
relatively expensive to purchase
genuine receivers are expensive
not as beginner friendly in price(obviously)
Keep in mind this is my unprofessional opinion, and I am open to correction if you have other facts to correct me
just my two cents
Edit: I'm not trying to start a FlySky/Spektrum debate, I'm just posting opinions and observances from my personal experiences. I don't have any experience with jumper or frsky but have heard many positive things said about them
Me 😎