How specifically would you do this? Some of the domains may not be domains that should be blacklisted - the entry could have been intended for a different type of adblocker that works at the element level, not at the domain level.
For nl.?crit.net and fr.?crit.net, for example, how would you make these into a regex that is meaningful?
You loaded 1.28M domains from that list, and 13 were invalid. That's a minuscule amount (about 0.001 percent).