Learn Portuguese (Portugal): Aceita a frustração antes de falar com ela! - Accept the frustration before talking to her!

The suffix -ção is one of the most common ways to turn a verb into a noun in Portuguese (here, from frustrar, to frustrate). It almost always corresponds to the English "-tion". Remember that words ending in -ção are feminine, which is why it is a frustração, and their plural changes to -ções (like as frustrações).

Why is the verb aceita instead of aceitas if the subject is "you"?

This is an affirmative command (imperative) for the informal tu. To tell someone to do something using tu, you drop the "s" from the normal present tense form (tu aceitas becomes just aceita). If you were speaking formally to você, the command would be aceite.

Why do we use the infinitive falar after antes de?

In Portuguese, whenever a verb directly follows a preposition—in this case, de from the phrase antes de (before)—it must be in the infinitive form. You cannot use a regular present or past tense conjugation right after a preposition.

Since this is a command to tu, could I use the personal infinitive falares here?