Is it time to quit?

You're welcome! Let's take a look:

Wordstream is fairly solid and they have some FB Ads Benchmarks which you can read. You're certainly outperforming their benchmarks and that doesn't surprise me: Wordstream is pretty solid IMO.

It's important to actually document what you've done in detail, and the changes you've made. People like to talk about A/B testing, optimization, etc but most of them are doing guesswork. Treat it almost as if you were running an experiment, because in a real way, you are. So document everything as you're "testing" things. Don't haphazardly through things at the wall hoping it sticks. It takes discipline and I've been guilty of cutting corners, but having that documentation will be a huge boon as you look to see where you can improve things and avoid repeating stuff you've already tried.

Your numbers look pretty solid on the email statistics. Open rate, CTR, and EPCs are nothing to sneer at either so it's just a shame your commissions seem to be low. I'm presuming these aren't recurring either. I presume your emails are plain text, not HTML....I'd be surprised if they were HTML since plain text outperforms HTML emails across the board.

On the point of recurring revenue. It may be prudent to see what is available for affiliate offers with recurring revenue/subscriptions. Since you're in women's weight loss, there are physical products like supplements. I know in 2009 there was good money on autoshipping/recurring orders but that blew up with class action suits and lots of affiliates got jacked up. There may still be some subscription/recurring physical products available to promote though....you'd have to look. Other options are, of course, membership sites and digital products in the weight loss market. I'm not sure which retailer you belong to (CJ/Clickbank/etc)

High ticket would be difficult to find....but take a look. Depending on how you frame your communications, you might be able to go towards empowerment/self-esteem offers and I'm sure there's a female guru out there that has some "mastermind" or seminar or other high price item with an affiliate program. This may require some deep legwork and possible networking.

You can also absolutely create your own product as well. I'd certainly suggest continuity/subscription for that as well. Hell, you could even create your own high ticket item if you have enough clout with your subs. But being a product owner/vendor is more taxing than simply being an affiliate. That's not to say it isn't worth it - but it's an important consideration.

From the look of things, you're doing a lot of things right! Initial steps appear to be:

1. Document your existing process.
2. Record your changes to your process. Past and projected.
3. Research offers with higher payouts or recurring revenue.
4. Research high ticket offer for the end of your funnel.
5. Sketch out your product offerings and funnel to get a full understanding of what your subscriber lifetime value is.
6. Draft possible product to create.

Happy to keep the conversation going. Hope this helps as well.

Yes. A successfully retired one. When I'm not cruising S. Jersey shore points in my absolutely beautiful BMW convertible, I'm sitting on the dock of my lakeside home. Things could be worse. :-)

Not bragging, here - just highlighting the fact that while you believe that things have been 'proven,' like most of what you state as fact, it is nothing more than a figment of your limited imagination.

Good luck with getting there.

Shall I go on? It's still early in the day. lol