One issue I see in this whole thing is that some here do get this crash for different reasons, and somtimes at different times so just tracking down whos' getting it from what is very hard, especially if the few that actually manages to sort it out for themselves, I haven't snatched up their solution.
So far I've noticed it can be many things, and sometimes noone of them work aswell, just keep in mind that the crash I talk about now, as in just launching the game, is not the same as crashes you sometimes get inside the game after playing a while, or possibly after editing a character or map. Just plain out crashes without no luck of even playing.
Potential things it can be so far is things like a user running with water reflections on, wrong rendering mode that doesn't work properly or any other ingame setting
Another thing it can be is because you are installing FH, or the FH patch with a broken installer that you got, and you never get all the content into your game directory that you need in order to play, in this case, a complete removal of FH, and the download of the FH game installer by torrent should sort this.
Possibly that the user put into custom objects and meshes even maps that doesn't work well after the patch. I know for certain "some" users had issues with objects and meshes, if you'd reinstall the game after removing the C:\FeralHeart folder without adding custom things into the game, you should be fine if that was the cause.
Yet Another thing it can be is that it requires a screen driver update, but that should be fairly uncommon, but the chance can still be there.
It can even be something else that users are not even able to sort, even though it should work since a lot of users already play the game fine, or even 2 or more alternatives that's listed above. This is just plain out things it can be and as you can see it's easy to mix things up, especially when users sometimes mix their issues together with others since it was "crashing", but it could be crashing from different things. It could be crashes at the game startup, it can be crashes at the character selection screen, it can be crashes after some time of playing or in the map maker.
The only thing I can say is really the ones I listed above, and that if you do it all correctly, it could be something in the game that was changed and needs fixing, and hopefully gets it in the future. The game did go through an update of the ogre engine it's running though, so it might explain why some users get errors.
This is somewhat of an underground game still, the game got a patch for the first time in several months, and things within the game were updated and changed that could cause instability so some trail and error is most likely needed, and this doesn't look like a simple "press one button to fix" issue. As mentioned, it can be many things and if this is a major ingame bug that does cause this I really hope it's going to get sorted, but so far I've gotten mixed images about what it can be, and I cannot say for certain what to do or what there is to blame.
Hope this was informing in some way.
