Trump was always getting acquitted - any judgment of the House Managers has to be viewed through that lens. They still accomplished a lot though. Trump's legal team has been outed as an even bigger joke than most would have imagined. Significant Republican support for Trump's guilt has been established and put on record. A roadmap for both civil and criminal charges against Trump and his cohorts has been laid out. Finally, the divide between Trumpers and Conservatives has been reinforced, even if it's still pretty blurry.
And it didn't take long. All told, as losses go it was a huge win. One party looks strong, competent, popular, and reasonable. The other is in disarray, clinging to embarrassingly transparent excuses in fear of how little they understand of their own constituency. On we go. The real legal system won't be quite as rigged for Trump, hopefully.