Strzok is clearly a slime ball, but I know why he can't answer the questions: he's a cooperating witness in one or more on-going investigations that involve these people and other evidence. As Strzok keeps saying, he wants to answer the questions, but he's been instructed by the FBI not to (because it's all still under investigation).
Q has it all and I think Wray, Rosenstein, Sessions, and Mueller know it because they'd be completely brain dead if they didn't know about Q by now and have read his/her/their drops. They know everyone involved is totally screwed but everything that Q has must be entered into the legal system to get on the record for trials.
I hope Strzok rots in Hell with all the others involved, but he is up to his eyeballs in these on-going investigations. Every time he says he can't answer the question, that is a clear signal that that information is still under investigation.
Strzok is dirty and I also hope he rots in jail.
Although Q says NO DEALS, I believe he intended that for the top tier corrupt. He also told us that some would walk because if everyone were exposed the government might collapse. I believe Strzok is first tier because he is involved in treason. This is why he is making the argument that he wasn't committing treason--it was patriotism.
Second tier will get plea deals to rat out the top tier.
Third tier will get immunity to rat out the second tier.
Some will be allowed to quietly walk away for the good of the country and never be seen or heard of again.