Well it's a bit of a slow period for Switch, I wouldnt really consider the first 2.5 months of 2019 to be indicative of the overall Switch library or release schedule. I also didnt include smaller scale titles which is something Switch gets in abundance.
All consoles go through a slow period, PS4 is usually in the summer while this year and last year it has been late Winter/early Spring for Switch.
It seems to me that slow periods are more common on Nintendo side. PlayStation side can have 10-12 consecutive weeks with consistent solid releases many times in a generation, almost every year, while on Nintendo's side, it's rather rare.
God bless You.
When PS4 will hit 100m consoles sold: Before Christmas 2019
There were three ravens sat on a tree / They were as blacke as they might be / The one of them said to his mate, Where shall we our breakfast take?