Yeah. I refused to return after seeing how the "porn" ban affected the site as well as the search features.
Twitter definitely makes it harder to browse through an artist's past work, and practically no one uses hashtags. I'll let you in on a little secret, though; from:[Twitter handle], since:[year]-[month]-[day], and until:[year]-[month]-[day] will help you out.
Ex: If you wanted to find an S.L.B drawing from July 2018, you'd type "from:slbtweetty until:2018-08-01" in the search bar to begin.