I think Red Tails has been harshly criticised. Every flaw has been picked apart. I find the CGI fluctuates from very realistic to very PC pilot, the plot is predictable and some of the acting is questionable but it makes a nice change to watch a rare modern foray into a mainstream aerial combat film rather than some air headed rom com.
If you really watch Battle of Britain some of it’s truly awful. Hotchpotch editing, wooden acting, wooden spitfires and the less said about the love story the better. Yet it is still the benchmark for film of that genre.