1 year ago, on 12/3/2019 Tucker 3,634,000 viewers. On 12/3/2020, 3,527,000 viewers.
That's a 3% loss (on this particular day of the year), not a collapse. Some days show an increase, but mostly about the same.
Tucker's ratings jumped after 12/3/2019, reaching 5,359,000 average viewers in Sept/Oct 2020. So yeah, it's a ratings collapse.