The holistic answer to your question is there is no answer. There are no metrics of comparison with linen. There are no types of linen. Thread count doesn't mean shit. Brand name doesn't mean shit save for possible warranty claims. So here are your options:

1. Wash them less. Hand wash them. Air dry them.
2. Find a vendor with a lifetime warranty. One example: https://mellanni.com/collections/shop-all/products/100-flax-linen-bed-sheet-set