They can bitch and whine as much as they like, letting people blow off steam is part of the process by which democracy keeps the peace. Aside from various small and short riots, there has been very little political violence in America since the 1860s.
Attempting to overturn the results of the election as the votes were being counted in the Capitol is quite an escalation, though. Sure, it's not up to 1860s standards, but it's still unprecedented in modern times.
While true, the law has also come down harshly on the participants. It should have a chilling effect for other would-be rioters. It was bad, I agree. But perhaps the silver lining is that its occurrence may help set a firm line on what behaviors are acceptable.