Cooking 5-course meals for men you're not even dating, or just starting to date, is a sweet gesture but it won't get you the results you're hoping for. It'll put them off. Unfortunately, it looks like you're trying too hard. I know it's your job and you enjoy it, but even so, it's just much too keen.
That's the reason they're not turning up with any wine or anything; they are in the role of the "pursued" rather than the "pursuer", so they're sitting back and waiting for you to impress them.
Also, why are you offering to pay halves when a man takes you out to dinner?! Don't believe that crap about men being scared to be used for their money. Men make money purely to impress women with it! 😆 Any bloke who claims that crap either just doesn't fancy you, or is criminally stingey.
If you like cooking, use it as a say to repay a man for several dates out. Let him take you out for 3 lovely dates, then cook for him to say thanks. Or for his birthday. Or preferably to celebrate your engagement.
My now DH used to take me out for dinner all the time. And he was BROKE. Or if my DC were at home, he'd bring ingredients to my house and cook lovely meals.
I made him a bacon sandwich after he changed the oil in my car. That was when we'd been dating 4 months.
Now are married, I cook for him almost every night! But until then, I didn't have to.