u can play older versions of RoC and TFT pre-patch 1.32 but u cannot play Reforged on a previous patch bcuz that would break online play for everybody in multiplayer lmao… what r u thinking??
if u want to play on patch 1.31 or an earlier patch u can do that, personally I think the best patch version for campaign is 1.26 thats obviously not Reforged but that is the best way to experience the original campaign
if u want to experience the new reforged campaign, then u just have to be patient while they fix it… the entire map making community is in a bad place bcuz each patch causes new bugs for map makers, and thats pretty much always going to be true unless Blizzard can get a proper team together to work on the game (which they wont) so all we can really do is hope they roll out another patch soon to fix the current bugs
In all honesty tho, the campaign bugs are not a big deal out of all the problems in multiplayer and custom maps, the single player campaign is certainly the easier to fix, so theres no reason for people who only play the campaign to be acting as if its the end of the world lol… the campaign was pretty broken even prior to the recent patch anyway, like I said 1.26 is the best patch for campaign mode