I actually do, too, and basically have drawn the same conclusions you stated about his level of social skills. But if he purposely used his live eviction speech to talk about blow jobs, ick. I just see no reason for such a seemingly sweet, sort of clueless guy to go there on the live broadcast. If he's really the Scottie we saw earlier in the show and/or if he was convinced by someone else to say it, I think he's embarrassed himself, and feel bad he's now in that position.
That said, I don't feel bad for Angela or Tyler -- getting "accused" of having sex doesn't rate high on my list of insults. And if they've made houseguests dislike them & want to throw them under the bus, that's on them & the way they've chosen to play the game.
Even now, I'm not sure what exactly Scottie said or what he meant by it. There's a transcription posted of words I couldn't hear, but who knows if it's accurate? I hope he explains at some point because until then, for me, the jury's still out (bad pun intended).