Working off of Zhuge's info of Switch being a single digit % decline YoY, and using 284k Switch from last year, I get:
256k < Switch < 284k
PS4 < 118k
71k < XB1 < 79k
Last year was Switch 284k, PS4 191k, XB1 101k for comparison.
XB1's lowest ever month prior to this was 77k in May 2014, this could be a new low. PS4's previous lowest month was 137k in May 2019, so this is a new record low for PS4 by quite a way. Next gen can't come soon enough for PS and Xbox.