So I recently went to Jigoku to play online and I noticed three things;

1. The Tainted Lands were added but were not functionally properly

2. People were being snarky when I mentioned that it wasn't working.

3. People starting "casual" games but when I entered my "casual play only" deck they remark, "Valid only" or No Casual Play only

Sorry to rant mates but this defeats the purpose of casual play. If you want competitive games, they start them that way.

1. The Jigoku devs as far as I know aim to implement stuff for official release.

2. Well people on the internet are rude that's why we play paper game.

3. The notion of casual is different for every person, usually people accept to play with new cards before release if they work.

If you want your to avoid issues, just create you own game and specify things on the title.