Alcala is OK, he was a dumpster fire for most of 2021 but had a superb September that obscured his rough season, so 2020 was his only quality season.
Celestino had a graduation year of 2021 IIRC, and I poised the thought that it was more likely he wouldn't be ready until 2023-24. And here we are, he's still not ready and doesn't profile to be any more than a 4th OF. He did hit over .300 for a couple months last year which was nice, but he completely cratered the rest of the year.
It's clearly a bad trade, but the real reason why had more to do with the Twins failing to maximize Pressly and the Astros immediately flipping the switch and turning him into one of the best relievers in baseball. It wasn't a Liam Hendriks situation, it was near-instant. That makes the trade a total loss, seeing as how he was integral to multiple playoff runs and a title to boot.