Yep, eToro is annoying in this regard.
I’ve used them myself in the past and ran into the same problem.
I found you could keep FX fees down by using exchange services like Wise where the rates can be better than the ones eToro charges. So convert your euros to dollars using Wise or another service and then transfer to your eToro account.
It’s a bit of a hassle but it’s the best way I discovered.
