I was thinking about makeup products that I DON'T like and I came up with a LOT.
Allow me to share a few with you:
Bourjois serum foundation- horrible formula, made my dry skin very, very oily.
Dior Forever foundation- oxidised a LOT
Freedom eyebrow product (like ABH Dipbrow but shit)
Maybelline Lash Sensational (pale pink tube) mascara- just thought it was rubbish
Max Factor lipstick (stick one)- slid all over my mouth and felt so oily.
Colourpop lipstick- all looks purple on me and I have 20 of them 
Benefit They're Real mascara- clumped my lashes together
Bourjois concealer- oxidised a LOT
Benefit Push Up eyeliner- dried out quickly and was awful after that.
Collection mascara- Black tube. Literally did NOTHING.
Natural collection foundation- when blended out it went all clumpy and came off my face and went GREY??
I have a few Make Up Revolution highlighters- the silver one doesn't even show up?! Love my gold one though 
The worst one... Illamasqua rich liquid foundation. Went patchy as hell and separated. Looked disgusting. £36 as well. ----2/10.
Might be controversial, but I have to use twice the amount of MAC Studio Fix Fluid foundation to get full coverage than what I do with my L'Oréal one. Is it just me? About six/ eight pumps to do my whole face, whereas the L'Oréal one (infalliable in the glass bottle) is usually three, four at a maximum but rarely needed.
What about you?