Unfortunately you're not missing to much at all, every product sourcing platform has its advantages and disadvantages, with Drop Shipping, zero or low cash outlay, and no storage space or distribution requirements are the big advantages.
Because of those advantages it makes it an extremely popular platform for a lot of sellers to use, especially when just starting out. What that does of course is mean that you have thousands on thousands of sellers all trying to do the same as you, combine that with everyone wanting to sell on the most popular online marketplace of all, and you end up with a completely saturated marketplace where even breaking even at times is a struggle.
There are some that do make some money from it, I really don't know how much or how regular that income is, but if it's Drop Shipping that you want to use to get into the market, then I would suggest that ebay is not the best way to go.
I know someone who built their own specialist kitchenware website, and stocked it with nothing but drop shipped kitchen products, spend a lot of time and a decent amount of cash on marketing it and they now have moved that platform into wholesale.
Drop Shipping does still provide opportunities to get into the market, but sellers are having to be a lot more creative in doing it these days. It's no longer just a case of dumping a load of DS products on ebay and making money anymore.
I would suggest you start exploring other selling opportunities and see if you can develop a plan centred around one of those, either that or you are going to have a find a product not saturated on ebay to have any chance, and I'm not sure I like those odds very much