Hey.
There are plenty people running LE successfully on Linux so chin up… 
Personally I do not, so I am just offering some advice here but there are other Linux users who can/do chip in on ocassion…
Crashes at specific locations / loading into maps tend to bey corrupted install files (yip, happens often), graphics issues or if it happens on only one a specific character - corrupted savegames.
First things is if you are using Linux Steam, then please make sure to verify the game files…
Next… temporariliy drop your in-game graphics to 1080p, 60fps framerate limited (not vsync), ALL in-game settings to very low or disabled. Try and see if the crash still happens - if it does, then its likely your problem is not graphic related. If it stops crashing, then you have the known graphics instability issue and have to dial back your settings to find a “stable/best” config that works for your setup. LE has performance issues so being conservative, irrespective of what your hardware is capable of, is the best course of action right now.
Memory… This depends heavily on the game settings chosen… I have heard that its similar on Linux but on Windows you can easily get system memory usage up to 12GB and more just by changing in-game settings and framerates… Running the game on 1080p, with very low settings uses about 8GB on window 10 for me. From my experience it does increase/decrease over play and settle at a baseline but there are people who report that memory keeps climbing to the point where they find they have to restart the game every few hours. There has been no formal confirmation of this as it seems very hard to replicate on demand.
If the graphics & game verification above didnt do anything, then you can try and reset the game but backing up the ~/.config/unity3d/Eleventh Hour Games/Last Epoch/ (or wherever your Linux distro put the LE files) and then removing the Last Epoch folder for it to recreate on next launch… This should reset your instance of the game to a clean state… If this works and a new char doesnt crash, then you can copy your backed up savegames back and see if they are ok…
Beyond that, I would do a search on the Forum for Linux related errors… There are issues around particular distros having hassles, Mesa driver issues, Vulkan, Proton …
Without playing the game on Linux myself, I cannot personally offer any other than the general (OS agnostic) help above… If you do see anything promising in the other Linux threads than I would ping one of the people involved - perhaps they can help more specifically than I.
