Ouch... when a squid makes a FMJ reference and one jarhead has to link the movie quote for another one to get it. Gotta have a thick skin around here!!
OP, as you can see there is some variety in naval aviation- even if it might feel like your peers eat, breathe, and sleep flying there are a surprising number out there who don't quite do that but are quite successful. Regardless, you're not alone with that ebb and flow of stress vs enjoyment and feeling like stress might be winning on some days. Think of it like when you have a good coach then practice is always challenging and rarely or never very easy.
Stick it out for at least a while longer. Seek out instructors who enjoy teaching instruments (they exist...) because that's the foundation of getting your future weapons system to where it needs to be day/night/in bad weather, and formation too (not hard to find IPs who love forms). Forms are fun for a few good reasons, they're a lot like riding horses, but most importantly your flight leadership and teamwork will spell success for both you and your form partner- which is actually pretty cool about primary forms.