Are you using too much product?
Moisturisers and serums are meant to be concentrated products that require very little. If you are applying a lot in hopes this will fix your skin faster, sorry to say this will have the opposite effect.
Providing your skin with too much moisture will result in skin that slows its own natural oil production leaving you drier in the long run not to mention clogging your pores with more product than your skin can absorb leading to breakouts.
Likewise with serums, too much can lead to oiliness, irritation and can diminish the effectiveness of what the serum is intended for.
So go light applying just enough for the intended effect whether its hydration or correction.