Arghhh so frustrating, I've been in this maze for almost two hours; is there any logical solution to the entrances/exits?

Yes. I recommend:

1/ making a map with pen & paper, and
2/ dropping different items in each area so you can identify them.

Those were the two things that got me through.

Dropping items and mapping works the best.

And don't forget to check the attached room that branches out to the right. I didn't realize it was there on almost all the rooms until I fought those spiders.

I solved it like Coaster said in the previous post.I numbered all the rooms with droppong equalivent number of
potions and made a map.You have to go through all of the rooms and search where you get

Spoiler
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to the place where the different entrance its.
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End spoiler