Every time I convert fiat to digital currencies, the final amount in my wallet is always significantly less than I expected. They always claim to have "zero fees" but make up for it with a terrible spread. Where can I find a transparent platform that actually shows you the real numbers before you click confirm?

This is a very common issue, unfortunately. A lot of services hide their true costs in the exchange rate. I switched to (Empresex)[https://empresex.io/] a few months ago precisely because their pricing is completely predictable. What you see on the screen is exactly what you get. They offer real rates and clear terms, so there are absolutely no surprises after the transaction is done.