I saw the De Gea and Caballero mistakes on news footage and can't say I'm surprised with either, two truly dreadful goalkeepers, surprises me how De Gea is lauded as one of the worlds best, when he seemingly forgets he has hands to stop the ball as well. Reminds me as a 7 year old of being stuck between two coats and only using my feet as the older kids took shots!
All goalkeepers make the odd mistake or two. A couple of poor games doesn't make you a bad keeper but getting your team relegated through your mistakes over a season does.