It's not just you. Some of these are obvious since we were playing in a LCS or WS, but:
1981 - Lose to Yankees, who play in WS.
1982 - Lose WS to Cardinals
1992 - 92 wins, Finish 2nd in ALE to the Jays, who win WS
2008 - Lose to Phillies, who win WS
2011 - Lose to Cardinals, who win WS
2018 - Lose to Dodgers in LCS, they lose WS
2019 - Lose WC to Nationals, they win WS
2020 - Lose to Dodgers, they win WS
2021 - Lose to Braves, They win WS
2023 - Lose to Diamondbacks, ??