A lot of microplastic is from textiles. If you ban all sources of microplastics you'll be back to wearing only wool, cotton, silk, linen, and leather.

A lot of the remainder is from plastic single use containers. Instead of banning them they could simply be returned to the shop from which they were bought for recycling as is done for most drinks containers (both plastic and aluminium) here in Norway.

Banning plastic bottles would mean a substantial increase in energy use because the alternative is glass which is much heavier and more costly to recycle. Perhaps we could switch to aluminium for more containers.

It fashionable now to complain about the deliberately created microplastics like those used in cosmetics but the vast bulk come from wear and tear on what are now effectively traditional materials.