Thinking about Altuve I went down the rabbit hole on the best 2nd basemen heading into 2023 and how they are doing this year.
Most lists for the position are similar at the top (based on 2022 results), so here's one for grins:
https://www.justbaseball.com/mlb/top-10-mlb-second-basemen-for-2023/Here's how they performed in 2022 (from the linked article) and 2023 (I use bWAR for 2023 because I find it easier to navigate the site):
1. Altuve - (hurt most of the year) 6.6 fWAR in 2022
.6 bWAR; .850 OPS; 135 OPS+ in 2023
https://www.baseball-reference.com/players/a/altuvjo01.shtml2. McNeil (Mets) - 5.9 fWAR in 2022
.8 bWAR; .652 OPS; 83 OPS+ in 2023
https://www.baseball-reference.com/players/m/mcneije01.shtml3. Semien (Rangers) - 4.2 fWAR in 2022
3.9 bWAR; .786 OPS; 115 OPS+ in 2023
https://www.baseball-reference.com/players/s/semiema01.shtml4. Giminez (Guardians) - 6.1 fWAR in 2022
2.3 bWAR; .702 OPS; 96 OPS+ 2023
https://www.baseball-reference.com/players/g/gimenan01.shtml5. Hoener (Cubs) - 4.0 fWAR in 2022
2.8 bWAR; .725 OPS; 96 OPS+ in 2023
https://www.baseball-reference.com/players/h/hoernni01.shtml6. Marte (Diamondbacks) - 1.4 fWAR in 2022
-4. bWAR; .640 OPS; 79 OPS+ in 2023
https://www.baseball-reference.com/players/m/martest01.shtmlApart from Semien and Atluve that's a pretty sad hitting bunch this season.