TLDR: Maybe a controversial opinion but this is my personal experience. Helltides would be a lot more enjoyable if the mystery and living steel chest locations were just marked on the map (spawns can still be random and change, that’s fine).
I quite disliked doing helltides for a long time because of how frustrating and tedious it was. So I mostly stayed the hell (harrharr) away from them. Randomly farming up shards is fun enough but then having to endlessly run around the whole map (ignoring everything else), while constantly alttabbing back and forth to look at all possible spawn locations, hoping to find the mystery/steel chests on time was just an awful experience.
My typical helltide would go something like farm shards for 30-40minutes then spend 20 minutes alttabbing, galloping all around the place trying to find the chests based on possible spawn locations. Half the time I still wouldn’t find them because they would rerandomize at some point or time would run out. It was a complete frustrating waste of time instead of actually playing the game (I’ve lost a ton of time, expired shards, and had to last minute settle for other chests after giving up looking).
Yesterday I decided to google my grievances and saw on reddit that ‘helltides website’ not only shows the possible spawns but shows where the current spawns actually are. That made all the difference and the activity became infinitely more enjoyable. I can now farm in the general direction towards the chests which feels a lot more satisfying, or even if I don’t I at least then know where to go to “complete” the grind.