He mentions several times that what's he looking for is PR on the fact (acknowledged by Comey) that Trump personally was not under investigation. Certainly could be inappropriate, but this isn't the smoking gun the dems wanted.
In short, Trump lacks tact and isn't a skilled politician. I think we knew these things.
Where this is going to bite him is adding more "acting suspiciously" wood on the woodpile, should Democrats win a majority and move to impeach on the basis of some other spark. Nixon probably wouldn't have been impeached over Watergate if there hadn't been a pattern of behavior.