It's about the application of the material, not about the material itself. Most polymers are used for disposable items, this is the problem. Single-use packaging and all disposable plastic items should be severely limited, since they do not actually use the potential of plastic as a material and harm the environment as a result.
Of the advantages of plastic, for example, durability, low heat capacity, low thermal conductivity in comparison with other materials, resistance to water and many chemical influences, ease of manufacturing the most complex shapes. Only with the help of plastic was it possible to solve many technical problems in construction. Passive houses in cold climates could not be realized before the advent of unique building materials.
Where different polymers are indispensable in construction and technology:
Wire insulation, metal-plastic water supply pipes, insulation of refrigerators, gaskets, sealants, damper tapes, damper gaskets. The most energy efficient window profiles have dense porous plastic inserts inside. In electronics and cars in general, this list is simply innumerable. It is only because of the excellent durable plastics that it turns out to brick up the pipes of the warm floor, to make the hidden wiring of heating pipes, water supply, and so on.