First off Hayleigh is still WAY closer to Fessy than to Scottie (which frustrates Scottie immensely and probably why he hates Fessy so much), heck she is probably closer to Brett than to Scottie, so if anyone would be jealous it is Scottie. I watch the live feeds, you probably just watch the episodes so I could see you being clueless to Scottie targetting Fessy as the aired episodes didnt make it entirely clear, but he 100% was. He had been telling everyone in the house Fessy was his target for weeks now, he even told Hayleigh a couple times which is probably why even Hayleigh threw him under the bus a bit. He also thinks he is bffs and super close allies with both Brett and Tyler (ROTFL, dumb ass) so would never have put those up, obviously never puts Hayleigh up, nobody is targetting Sam, so at the very least Fessy is one of his first targets if he wins HOH and atleast the first replacement nominee if his target had won veto. He was definitely no ally to Fessy, dont kid yourself out of blind love for Scottie (who casuals seem to look for some reason that totally escapes me) or just because you hate Fessy.
Fessy was probably dumb to put him up given his limited options, but he wasnt that dumb considering Scottie was a super shitty ally, who was visibly gunning for him, and didnt even pretend to be on his side like Tyler and Angela did (clearly they arent but it is easy to say people believing them are stupid watching on TV but they have fooled nearly everyone all season). J.C or even Sam are still probably less likely to put him up had they won HOH than Scottie would be mind you. Scottie is the real dumb one given that he likely would have put Fessy up even though he has even fewer options in the house left than Fessy does, all because he doesnt like Fessy.
As for their conversation I saw it too and Scottie was the dumb ass. Fessy layed it out to him "Hayleigh and I are close, you and Hayleigh are close, but you and I arent close for some reason." "You and I never talk game". That was Scottie's time to reassure Fessy he was with him, tell Fessy he was with not only Hayleigh but him to the end, that he would never put him on the block or target him, and make some kind of deal, and of course actually you know TALK GAME with him, but dumb ass Scottie just beat around the bush, refused to give Fessy any kind of insurance or straightforward answers, and gave Fessy every reason to put him dumb ass on the block and send him home.