Pat is tidily-trimmed and having a shower.
Mom feels guilty because, in spite of being with him almost every day, she wasn’t able to get Dad the care he should have had. It seems as if, at the facility where he was living, they weren’t even trying very hard.
Your mom has no need to feel guilty. Unless she was with him 24/7, she had no idea of his real needs. That is not her fault. She made the best decisions she could with the information she had.
Please convey my prayers to her. She will overcome her second-guessing.