A few factors:
A lot of fans are not content with a WC and they are really antsy and upset about the division.
They did give up a lot, in hindsight, to open that space up for Tucker.
Tucker has a 13 wRC+ this month. He took 2 days off and came back to another 0-fer with multiple groundouts. They are skeptical that he figured anything out in the cages.
Bellinger has bounced back to 2023 form, and the fanbase absolutely loved him that year. He was versatile and obviously hit really well. If Bellinger hit in 2024 like he did in 2023 then Jed might not have made that trade in the first place.
They dont believe the Cubs will sign him.
They dont like trading a 1st round pick. The Cubs would have kept Smith in the minors for a lot more development than the Astros. Fans definitely have not checked in on Cam for a while, I am sure.
They could have put together a package for a TORP with Paredes and Smith, possibly.