From NetFlix:

When his father (Jim Broadbent) becomes terminally ill, Blake
Morrison (Colin Firth) struggles to come to terms with the charming
but duplicitous man he really was, reliving the memories that shaped
their relationship through a series of flashbacks. As Blake travels
between his wife and two children in London and his childhood home,
his emotional difficulty is mirrored in the agony his father
confronts as he succumbs to the cancer.

The NetFlix fails to mention that the mother was played by Juliet Stevenson.
All three British actors (Broadbent, Firth, Stevenson) are accomplished and
well-known. It is not a feel-good movie until possibly the very end. The
father was not a monster, but he was extremely hard to live with. So the
film is basically the love-hate relation between father and son. Most of
the movie deals with the son’s resentful memories of the father. As much
as anything, the film is about forgiveness on the part of son and wife.
I do NOT rave about this movie.

Almost ho-hum.