Мне надоело спорить в чате, поэтому я просто позвонил подруге.

I got tired of arguing in the chat, so I just called my (female) friend.

Breakdown of Мне надоело спорить в чате, поэтому я просто позвонил подруге.

• я: I
• в: in
• просто: just
• подруга: the female friend
• спорить: to argue
• чат: the chat
• поэтому: so / therefore
• надоесть: to get tired of / to be fed up with
• позвонить: to call (by phone)

Questions & Answers about Мне надоело спорить в чате, поэтому я просто позвонил подруге.

Why does the sentence start with Мне, not Я?

Because надоесть (in the form надоело) is commonly used in an impersonal pattern where the person who feels it is in the dative case:

• Мне надоело… = I got fed up… / I’m tired of… (literally: To me it became tiresome). So мне marks the experiencer, not the grammatical subject.

What is надоело grammatically? Why is it neuter singular?

Надоело is the past tense form (neuter singular) used in an impersonal construction. There is no real subject like it in English; Russian often uses neuter singular past to express “it happened / it became so”:

• Мне надоело = I got fed up
  Even if the speaker is male or female, надоело stays neuter in this pattern.

Why is спорить an infinitive here?

After мне надоело, Russian typically uses an infinitive to name the activity that has become annoying/tiring:

• Мне надоело спорить = I’m tired of arguing / I got fed up with arguing
  You can also use это + noun sometimes, but the infinitive is the most direct and common.

Is надоело perfective or imperfective, and why is that important?

Надоело comes from надоесть (perfective). It usually means a completed change of state: you reached the point of being fed up. Compare:

• Мне надоело спорить (perfective result) = I got fed up (and likely stopped)
• Мне надоедало спорить (imperfective, less common here) = Arguing was getting tiring (repeatedly / gradually)

Why is it в чате (prepositional), and could it be something else?

В + a location meaning “in/within” takes the prepositional case:

• в чате = in the chat (chatroom / chat)
  If you were expressing motion into something, you’d use в
  • accusative, e.g. в чат = into the chat (like joining/entering).

What does поэтому mean, and does it affect word order?

Поэтому means therefore / so / that’s why and links the two clauses logically:

• …, поэтому … = …, therefore …
  It doesn’t force a special word order, but it commonly comes right after the comma, as here.

Why is there a comma before поэтому?

Because you have two clauses: 1) Мне надоело спорить в чате
2) я просто позвонил подруге
They are joined by поэтому, so Russian punctuation uses a comma before it in this structure.

Why does the second clause have я if the first clause already implies “me”?

The first clause uses мне (dative experiencer) in an impersonal construction, so it doesn’t provide a normal grammatical subject. The second clause is a regular personal verb clause, so it needs a subject:

• … поэтому я позвонил… = … so I called…
  Including я also adds emphasis: so I (as a result) did X.

What is the role/meaning of просто here?

Просто often means just / simply, implying the action was straightforward or a contrast with something more complicated:

• I got tired of arguing in chat, so I just called…
  Its position is flexible: я просто позвонил is a very natural placement.

Why is it позвонил (perfective)? Could it be звонил?

Позвонить is perfective and focuses on a single completed call (the result/action as one event).

• я позвонил подруге = I called my friend (once, completed)
  Звонить is imperfective and would usually imply process/repetition:
• я звонил подруге = I was calling / I called (habitually or with focus on the attempt/process)
  In this “decision → action” context, perfective позвонил fits best.

Why is подруге in the dative case?

Because позвонить кому? (to call someone) governs the dative:

• позвонить подруге = to call (to) a (female) friend
  This is different from звать / позвать (to call for / summon) or называть (to call/name), which use different patterns.

What if the speaker is female—does позвонил change?

Yes. Past tense in Russian agrees in gender/number with the subject (я):

• male speaker: я позвонил
• female speaker: я позвонила
• plural: мы позвонили
  But надоело stays the same because it’s impersonal.

Does подруга mean “girlfriend” here?

Подруга primarily means female friend. It can mean “girlfriend” in some contexts, but then it’s usually clear from situation, or people may specify моя девушка for “girlfriend” (romantic partner). In a neutral sentence like this, подруге is most naturally understood as a (female) friend.