OK, first of all bear in mind I use an X-T10, slightly different sensor from yours. But still something is not right here. Assuming you're properly exposed, I would suggest a Highlights setting of maybe -15 to -20 most of the time, assuming you're looking for a filmic-style highlight rolloff. Of course, every picture is different, but that's the ball park I would expect unless you're going for a Serge Ramelli type of look. It's not clear how you're exposing either, but
@Mr Perceptive's advice is good, IMO. You'll probably find the Iridient plugin useful for landscape, but don't set the Sharpen too high (I use Low or None) because you can always add more later! In general, be sceptical of advice about exposure and PP that is not Fuji-specific. Bayer and X-Trans sensors are not the same. I'm not even sure the LR numbers mean the same things

. EVen with my humble X-10 I'm amazed how much shadow detail I can recover, but it may be worth bracketing your exposures for a while (say 1 stop plus and minus) until you get the hang of your new friend. When I moved on from Pentax, I wondered for quite a while about whether to buy the X-T10 or the A6000. In the end, it was the strength of the Fuji kit lens that partly won the day, but also the very obvious liking most Fuji togs have for their cameras. I'm sure if you stick with it, you'll get to like yours too!