Good managers make the best of what they have. If you want to look for millions of excuses for Martinez you can convince yourself of anything. Every manager in the league is dealing with the same issues. Ranieri has had Vardy out for weeks, Pochettino now has Vertonghen out, Klopp is missing most of his strikers. Part of the job is adapting. Maryibez's problem though is that the team has to be 100% perfect to get good results, he always needs his first 11 all in form and confident otherwise he just washes his hands of any responsibility for the results.
Baines has been injured but he's had Oviedo, Galloway, and Garbutt to choose from. It was stupid to loan Garbutt out but that was his choice. He was given funds to buy Funes Mori to cover for Jags and he has done. Browning covered Coleman and Stones has moved over when necessary.
Under Moyes we sometimes had to play with Hibbert and Duffy at the back, I even remember them keeping a clean sheet in an away European game.
You have to adapt to win games, this current line pedalled to once again absolve Martinez of any blame is pathetically weak.