I won't attack you but your arguments, that are also the arguments I hear more often about football coming from other US citizens.
You dislike the game because it's slow and has low scoring...ok but you watch hockey in US and hockey has often short scoring as well, baseball is slow as fuck, with constant interruptions in the game, so does american foolball, yes both have high scoring though.
The basketball argument, I may understand that a basketball fan won't like football and I'd say it's the most majoritary sport in US by far or that's my impression at least, that happens in our countries also.
Places where basketball has importance are, usually, less football oriented, there are exceptions, like France or Germany though, on the other hand you have countries like Lithuania, Slovenia or the balkanics where basketball it's the main sport.
In the end, it's ironic because all these arguments should make football less popular in the rest of the world too, when it's not, the fact that this happens only in US I think that proves that the issue it's cultural, you won't accept football is fun because you're just biased by your own sports.
RE: Spain vs. Portugal kind of shows why most Americans don't get excited about football