Plant ids please

in Plants
Variety of plants of which I have no clue what they are! any help gratefully received.
Tall plant in the pot, suspect its a weed.

Spiky green plant with white berries/flowers.

Sprung up without me planting it, hoping for a flower, suspect a weed!

Lots if this in the garden, I didn't plant it.

Bought in a garden centre, has suffered, hasn't grown at all in a year and looks ill, red flowers.

Tall plant in the pot, suspect its a weed.

Spiky green plant with white berries/flowers.

Sprung up without me planting it, hoping for a flower, suspect a weed!

Lots if this in the garden, I didn't plant it.

Bought in a garden centre, has suffered, hasn't grown at all in a year and looks ill, red flowers.

Must stop buying more plants, repeat, must stop buying....
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2nd is pyracantha (Firethorn) - sharp thorns, lots of flowers and lots of berries
3rd looks like a willowherb - a weed
4th Rose Campion
5th possibly Bougainvillea - but see what others think
Wisdom is not putting it in a fruit salad.