Lol yeah despite your negativity, I think you're mostly on point.
Most people tend to avoid Jacare's grappling, so having to defensively grapple wears him out. It seems that was the reason Jacare didn't pursue offensive grappling but mostly stuck to striking, because he probably didn't want to risk opening himself up to someone who can test his grappling.
According to Jacare, he went out for a bit in the guillotine. Hermansson is ranked #5 now.