I mean the results were really good. 2.9, 5.1, 2.9 and 4.5 WAR in the previous 4 years, plus 1.8 WAR in 96 innings the year he was dealt. He was the 9th most valuable pitcher in baseball in 2018. He was 29 when dealt with 2.5 years left at like $10M a season. Don't bring up wins and ERA please.
The shine also wore off because he needed thoracic outlet surgery, which he tried to pitch thru in 2019. TB is good - but I don't think they're good enough to trade aces pitchers right before they need major, career altering surgery (maybe we'll find out with Snell!).