What is making you feel worn out? If combat is getting to you, try switching to someone else. Each character has a different play style. Plus dont forget about affinity and skill links. It can be fun to play around with different abilities.
Or if youve been going straight into the story, try doing some side stuff. Theres plenty of side quests, Colony6 reconstruction, the collectopedia.
Otherwise just stick with it. The story opens out eventually.
Or if you feel like not playing any more, thats ok too. Just because its the greatest game ever made doesnt mean its YOUR greatest game.
The grass is full of clingy things