This is genuinely the worst concealer I have ever tried. It does not work...

This is genuinely the worst concealer I have ever tried. It does not work with any base. I have multiple different creams, foundations and primers I have paired it with and it does not react well with any of them. It dries down very quickly before you get chance to blend, even after warming it up on the hand and applying with your finger. It dries cakey and chalky, separates and oxidises. Does not pair well with any type of power or foundation. It doesn’t blend with a brush or a sponge. In fact it will just lift off in patches when you try and use a beauty blender to tap it in. I am absolutely shocked how bad this is, I saw a lot of advertising by beauty influences online giving positive reviews so I felt confident it would be a great purchase. It does, however, appear a lot of the posts were paid advertisement, so perhaps on reflection not true and genuine reviews. A really horrible product, would give 0 stars if I could.