Use not enough and too when something is inadequate.
Too + Adjective
When the amount of something is more than needed/wanted we can use too + adjective. It is only used in negative situations.
It's too cold in this room, close the door.
I'm too tired to play football tonight.
She said she was too old to go to nightclubs.
Not + Adjective + Enough
Use the not + adjective + enough form for something lacking the amount or level that is needed.
I'm not thin enough to wear these jeans.
My house isn't big enough to host a party.
My car isn't dirty enough yet for a wash.