Has anyone noticed such issues? I am in the Latin American region, by the way.
No I didn't notice any issues like this with my Aqua.
I don't know what swaps you used exactly, but you can always try directly on Boltz exchange, and fees will be slightly lower.
Aqua wallet is using Boltz in the background, so you are basically using the same thing.
You can also try changing your IP address with vpn, but I think that would create problems only with Dolphin card that is not avaialable now.