Struggling to justify selling on Amazon

So I’ve been making my own products and selling them on Amazon with fba but I can’t justify spending £30 per month on Amazon itself and then another £2.50 worth of fees on top of the products that only cost me £2.50 to make.

I’ve been looking into selling my stuff on other sites like Etsy instead to avoid the fees and the headaches that come with amazon seller homepage and hopefully making my products more profitable for me as well as making them cheaper for my customers.

I started 6months ago and I do get orders but not even close to enough to justify the fees from Amazon.

I also do investing and not to brag but I tend to be good enough to outperform the market so I’m also considering giving up trying to make a business and throwing that money into my investments as it would honestly be less effort and more profitable.

Should I try selling on other stores? Should I try fbm instead of fba?should I give up all together and just focus on my investing ?

Any advice il take in as I’m not 100% sure if the reward is worth the risk current selling with fba.