This review may contain spoilers. I can handle the truth.
Widows paints such a complete picture of corruption that I found it almost oppressive or nihilistic. But, there are still characters doing their best to move beyond their circumstances, so it's not completely hopeless.
Even though I do think it's kind of oppressive, it's so effective because it's so well made in every aspect. It almost feels like it's better than it needs to be in a weird way with lots of interesting cinematography and use of audio that feels like icing on top of a core of solid performances and writing.