I have eaten canned horse meat once .

Theoretically speaking if the meat was entirely frozen this whole time then it's safe because almost any microbe activity is suspended for that duration ...

Recommendations are mostly geared towards being palatable rather than safety. The question OP should ask himself should be does he really want to eat steak with 2 year old freezing damage ?

If OP is squeamish then he should cook it "well-done" since that incinerates the meat ...

I am sure its safe, but I was just going to throw it away. The taste wouldn't be worth it. Instead my mom insisted on taking it, so I guess we will see just how much of a difference time has made on it. She intends to send me pictures of a perfectly fine steak.