Jeeze, give it a rest. So what if a one eyed person doesn't have perfect copperplate script. At least he did actually take time out to write this by hand, includes sincere thoughts towards her in her grief, and asks her to contact him if he can possibly help in any way whatsoever. As for the legibility, I can read the whole thing perfectly adequately, and it is far better than many GP's scrawls I have come across.
And I for one am very grateful for the invention of the word processor; my wife reckons she has 8 year-old kids at school with better written presentation than me.