As disappointing as the past couple of weeks have been they are still 10-8 in August which is still better (.558) than their season WP (as well as every other NL team's season WP except the two ahead of us). They also went 6-4 in the home games (.600) which is better than their season home winning percentage (.586).
Which is to say that while they still gotta actually go out and win some games against an historically tough opponent (as well as the top wild card competition) and two bad teams that still have playoff talent, I believe they will come out of this home stand with a winning record, and if it's 5-4 instead of 7-2 it's not the end of the world (especialy if two of those five are against the Giants).
Not sure the "level of competition" theory holds in August either - as has been mentioned Nats are playing well of late and we still went 4-3 against them. And Minnesota, Miami and Toronto are all good teams (while the Royals got handled).
I really think yesterday was a Little League World Series loss. It sounds like the Phillies did significantly more stuff than the Nats (they got there before they were required to be there to see Media play, and Harper, Walker and Thomson also all stayed later). And the Nats had nothing at stake.