I'm just not a fan of Ferrari. I was hoping Haas would use their own engines, but if not then Mercedes would be better than Ferrari. The problem isn't that Haas' team won't be 100% American; that would be a bit unrealistic at the moment.
How would they use their own engines...what own engines are you talking about. How would they develop such engines, they're not even a manufacture team in the current series they race in so who would help them? Even in NASCAR they don't build their own engines and cars for the most part so what led you to think they would?
Ferrari engines aren't that bad to be fair, and with further development in the 2016 spec engine it be that much closer. Ferrari seemed quite fast in Quali and seem to have a better all around car than the Williams with it's powerful Mercedes engine. Also what
@prisonermonkeys has said.
Also what does being a fan of Ferrari have to do with anything, it goes beyond engines, we're talking logistics, testing info, tools like CFD and Wind tunnels outside of HAAS to help the team be a proper b-team to Ferrari and run mid pack early on. Why is that an issue? Most teams that aren't manufactures have this agreement in place.
Marussia was with McLaren using the wind tunnel and other things, along with Ferrari development drivers and engines
FI got Merc help
RBR (since RBR has been the factory Renault team for a few years now) and STR sister grouping
Sauber have recieved limited help from Ferrari
The only teams that I know of being on their own are Lotus (former factory Renault team) and Williams who have been around forever. And even they have struggled financially to just build cars.
Also no team on the grid is 100% country of origin built. They have parts from all over and help from all over. The biggest knock against the German mark Mercedes is that it's not a true German effort, but a British effort for the most part.