The Covid-19 crisis will make Brexit look like a walk in the park.
I agree, but we're going to get both at the same time, so it's not necessarily about which is larger! Even with a delay of 12 months, or longer, the market conditions are going to be very different and more difficult than what was expected at the time of the referendum, but also when this timeline was laid out.
What will suck, is if it's pushed through for political reasons* - I would
think hope even the most ardent of Brexiteers will accept some form of delay due to the the current situation, but maybe not.
* it's quite likely the EU will put in place some fairly drastic measures to lessen the economic impact, depending on what they are and when they are introduced, we would potentially have to conform - without a voice at the table.
Also, for what it's worth (which you might judge to be precisely nothing), even as an unapologetic free market capitalist, if the country was in the doldrums, with a struggling economy, high unemployment etc - I would probably go out of my way to support British business and the like. If people across the world take a similar view - particularly in Brexiteer's target markets like the US, that could make things even more interesting.