angledDivider[text1_,text2_]:=Graphics[{
    {
        Directive[Thick,White],
        InfiniteLine[{{-1,1},{1,-1}}]
    },
    {
        Text[Style[text1,Directive[Bold,White,FontSize->11]],{-0.42,-0.4}],
        Text[Style[text2,Directive[Bold,White,FontSize->11]],{0.42,0.4}]
    }
},PlotRange->{{-1,1},{-1,1}},ImageSize->{70,70},Background->Gray,ImagePadding->None];

TextGrid[{
    {angledDivider[...,...],...},
    ...
},
    Frame->All,
    FrameStyle->Directive[Thick,White],
    Background->{{},{},{...}},
    ItemStyle->{{{...},{},{...}},
    ItemSize->0,
    Alignment->{Center,Center},
    Spacings->{{3->0.25,4->0.15,5->0},{3->0.25,4->0.15,5->0}}
];