Without seeing your data model, it’s hard to know exactly what will solve this issue.
The cause is your date table, apparently it is including dates from 1996 to 2026 - which seems like a lot of time. So my first question is, do you have data that requires all those years?
If the answer is no, I would definitely recommend trimming down the calendar to only the needed dates - that large a table is going to slow your model.
Once that is done, you need to have a column on your date table to recognize the period you want (like current year, or year offset, or something similar). This column can be used to filter your date table in the slicer.