I broke down games in previous posts, like the KC playoff game, the NE playoff game, and the Philly game last year where the special teams and offense were at fault for a bunch of points given up.
The defense has often played well with the offense and special teams screwing up. Those are just 3 examples off the top of my head.
Football outsiders and PFF take stuff like that into account which is why they both rank the defense high (and the offense low)
I just want to point this out about the Philly game last year.
Texans Drives and PHI field position on ensuing drive:
1. Punt - PHI starts on own 23 (77 yard TD drive)
2. Field Goal - PHI starts at own 24
3. Punt - PHI starts on own 10
4. TD - Touchback, PHI starts on own 25 (75 yard TD drive)
5. TD - Touchback, PHI starts on own 25
2nd Half Kickoff - PHI starts on own 21
6. Punt - PHI starts on own 12 (59 yard FG drive)
7. Punt - PHI starts on own 17 (83 yard TD drive on one play)
8. Fumble - PHI starts on TEX 44 (44 yard TD drive)
9. Downs - PHI starts on own 24
10. TD - PHI starts on own 45 (PHI punts)
11. TD - PHI starts on own 11 (77 yard FG drive in 90 seconds)
Outside of two drives, all of Philly's drives started within their own 25.
Texans special teams only punted 4 times, with all being downed within the Philly 25.
Texans special teams kicked off 6 times, with only one getting past the Philly 25.
Texans offense only had one turnover, with it barely being past midfield.
But the Texans defense gave up FOUR scoring drives of 75+ yards.
I'm struggling to understand where the Texans offense and special teams are at fault for a bunch of points given up. I'm also struggling to understand how a defense that gave up 4 very long scoring drives is considered to have played well. I'm using the game you hand-picked as an example.