Yes, both sides did. I think Louis Gohmert asked a very relevant question to Strzok. Strzok's adultery does bear on his character and credibility and his potential to be blackmailed. I just wish many of the Republicans who are attacking Strzok over his adultery realized they're making a case that also undermines President Trump for the very same reasons.
Strzok handled himself poorly. He clearly lied about the context of his anti-Trump text messages. The whole Louden County stuff was dumb and he should have just apologized and moved on. But he was clearly too smarmy to do that.
The Republicans were so focused on corruption and anti-Trump biases at the FBI that they failed to seriously address a relevant issue Strzok raised. The FBI was working under assumptions that the Russians wanted to help the Trump campaign and there was evidence to that effect beyond the Chis Steele dossier. But, considering even Strzok thought nothing would come of the Mueller investigation, it seems even he was prepared to move on by the end of 2016 from that angle. October 2016, however, was a different matter.
Concurrently, there were other avenues by which the Russians wanted to affect the election. Strzok was involved in investigating those as well and the GOP missed an opportunity to pursue relevant lines of questioning.
The Democrats flubbed the hearing too. They seemed so interested in protecting Strzok that they became willing to defend the FBI against some serious allegations. They outright dismissed the allegations and covered for the FBI. But the Inspector General's record shows the FBI handled itself poorly and Strzok, in particular, had a series of text messages that did so bias against both Donald Trump and his voters.
It is somewhat ironic that, in the Age of Trump, Republicans are ignoring Russia to focus on the FBI and Democrats are ignoring the FBI to focus on Russia.
It was not a fine day for Congress and is another in a growing number of reasons why cameras should be taken out of congressional hearings. The congress critters were more interested in grandstanding and the witness did himself no favors by smirking and preening the whole time as Democrats sought to protect him.