Did you actually watch the hearing? You seem to be missing quite a lot of context surrounding the president's communications with Comey. He assured him that he personally wasn't the target of a counterintelligence investigation, at the time, which Comey went through great lengths so make clear was technically true, but could be misleading.
While it's true Trump didn't ask him to kill the Russia investigation at large he confirmed that Trump pressured him to let Flynn go, as well as make a public announcement exonerating Trump. Something Comey felt was a bad idea.
We now know that the president is under a criminal investigation by Mueller for obstruction of justice.
There was also the tidbit that Trump never once had a conversation with Comey about what to do about future attacks by Russia on our democracy. I found that to be pretty remarkable.
The white house has already attempted to spin this as no big deal, but it's pretty obvious to see that Comey's testimony was incredibly damaging to the president.
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