Hey there,
Just wanted to let you know it's definitely not just you.
By the way, this issue is brand new for me. Whether on the PTS, North America server, EU server, or otherwise, I've never had ESO crash before, other than once in a blue moon. This all started with the update in late September which allowed access to the Writhing Fortress and Eastern Solstice. I've mentioned this in a few of my other posts, but no one else seems to be mentioning this issue, and the devs are certainly not acknowledging it.
I've been noticing a pattern with the recent updates. Here's a breakdown of what I've experienced, defining the patch iterations as I see them:
* Iteration 1 (i.e., the very first update on PTS where the Writhing Fortress and Eastern Solstice were accessible sometime back in late September): The game was unplayable, crashing every 5 minutes. I tried it on three different PCs and even took all the graphics settings down to the point I didn't know ESO could look so 8-bit, but that didn't seem to be a factor. It seemed to crash most in the overworld if you were crossing territory quickly. Dungeons and delves were pretty much stable, but the Writhing Fortress was unplayable. I also noticed that any enemy attack effect with a large fiery or magical vapor graphic would cause an immediate crash.
* Iteration 2 (Still on NA): This was the most stable version I've seen since the zone opened. There were still some crashes, but it wasn't too bad.
* Iteration 3 (Last Tuesday's update on the EU server): The crashes were much worse than the week prior, but still playable.
* Iteration 4 (The one that occurred just yesterday): I haven't tried playing much since this update.
So yeah, it's definitely not just you. I managed to get through the main quest last week (was eager to see how it ended), but I haven't really tried since yesterday's update. Maybe I'll check out some of the side quests.