Either way, by chosen favourite sport, football is fourth in the States, very marginally behind baseball. Both are miles behind gridiron and basketball - situation which is not going to change any time soon. The difficulty is that MLS doesn’t do great on cut through (but does wash its face with attendances and income these days) and most Americans will be watching the Premier League and (I believe) Mexican League and others.
Baseball, which I like, has even worse issues with cost barriers to participation than football. Football, marking its own homework so take with a pinch of salt, claims 14.1 million children and adult regular participants of outdoor games - of which a majority are male.
The short version: soccer is doing more than fine in the States and most negative views seem to come from people either expecting a World Cup win, it to overtake NFL, and/or MLS to become a global major league.