The switch is down 35% YoY which is more than I think most people expected, so I wouldn't say that it's performance is surprising in a good way.
I expect the Switch to do better YoY in the 2nd half of the year.
This is not the Switch's third best year just checked. Here's the sales by week 11 for all years.
Only 2018 is worse than this year, it's 5th out of 6.
Check against just the past 4 weeks.