Learn Spanish (Latin America): Este producto es peor porque no es resistente. - This product is worse because it is not durable.

Just like in English you say "worse" instead of "more bad", Spanish uses the irregular word peor. It is the direct opposite of mejor (better). Because peor already means "worse", you never need to put más in front of it.

Why is es used twice here instead of está?

We use es (from the verb ser) because being "worse" and being "durable" are considered core, permanent characteristics of the product. If we were talking about a temporary condition, like the product being broken or dirty, we would use a form of estar.

Why is it Este producto and not Esto producto?

Este is the masculine singular word for "this" when it points directly to a masculine noun like producto. Many learners mix this up because esto looks like a typical masculine word, but esto is actually the neuter form. You only use esto for abstract ideas or unknown objects when you don't name the noun, like when asking "What is this?" (¿Qué es esto?).

Doesn't resistente mean "resistant"? Why is it translated as "durable"?

It means both! In Spanish, describing an everyday object as resistente means it resists wear, damage, or breaking easily. The most natural way to express this idea in English is usually that the product is "durable" or "sturdy".