Статус не менялся со вчерашнего вечера, и это меня немного раздражает.

This is about aspect.

• менялся is imperfective
• изменился is perfective

In this sentence, the speaker is describing a state over a period of time: the status has not been changing / has remained unchanged since yesterday evening.

Russian often uses the imperfective when talking about:

• an ongoing situation
• repeated change
• the absence of change over a span of time

So:

• Статус не менялся со вчерашнего вечера = The status hasn’t changed since yesterday evening
• Статус не изменился would more naturally mean The status did not change or has not changed with more focus on a single completed result

Both can sometimes be possible in similar contexts, but не менялся fits especially well when emphasizing that throughout that whole time period, no change occurred.

Russian uses the past tense here because the action or non-action began in the past and extends up to the present through the phrase со вчерашнего вечера.

Literally, the structure is something like:

• The status was not changing since yesterday evening

But in natural English, we translate it as:

• The status hasn’t changed since yesterday evening

Russian does not have a direct equivalent of the English present perfect, so the past tense often covers this meaning.

Со вчерашнего вечера means since yesterday evening.

The preposition here is с / со, meaning from / since.

Why со instead of с?

Russian sometimes uses со instead of с for easier pronunciation, especially before certain consonant clusters. Both are forms of the same preposition.

Compare:

• с утра
• со вчерашнего дня
• со мной

So here:

• со вчерашнего вечера = since yesterday evening

This is the genitive case.

The preposition с / со in the meaning since/from requires the genitive.

Base forms:

• вчерашний вечер = yesterday evening

Genitive forms:

• вчерашнего вечера

So:

• со вчерашнего вечера = since yesterday evening

This is a very common pattern:

• с понедельника = since Monday
• с утра = since morning
• со вчерашнего вечера = since yesterday evening

Because раздражать takes a direct object, and меня is the accusative case of я.

Pattern:

• что-то раздражает кого-то
• something irritates someone

So:

• это раздражает меня
• this irritates me

Russian word order is flexible, and это меня немного раздражает sounds very natural.

Forms:

• я = I
• меня = me

So меня here simply means me.

Немного means a little, somewhat, or slightly.

So:

• это меня раздражает = that irritates me
• это меня немного раздражает = that irritates me a little / somewhat

It softens the statement. The speaker is annoyed, but not necessarily extremely angry.

Yes, Russian word order is flexible, and both are grammatically possible:

• это меня немного раздражает
• это немного раздражает меня

But the first one is more natural here.

Why? Because Russian often places pronouns like меня before the verb in neutral speech, especially when the object is already known and not being specially emphasized.

So:

• это меня немного раздражает sounds smooth and standard
• это немного раздражает меня may sound more marked or stylistically different

The basic form is меняться, which means to change.

The -ся ending often makes a verb reflexive or gives it an intransitive meaning.

Compare:

• менять = to change something
• меняться = to change, to be changing

Examples:

• Я меняю план. = I am changing the plan.
• План меняется. = The plan is changing.

So in your sentence:

• Статус не менялся = The status wasn’t changing / hasn’t changed

The status itself is the thing undergoing change, not something changing another object.

Это means this / that, and here it refers to the whole previous idea:

• Статус не менялся со вчерашнего вечера
  The status hasn’t changed since yesterday evening
• и это меня немного раздражает
  and this irritates me a little

So это does not refer only to статус. It refers to the entire situation: the fact that the status has not changed since yesterday evening.

This is very common in Russian:

• Он опоздал, и это меня удивило.
• He was late, and that surprised me.

Yes, you could, but the meaning is slightly different.

• со вчерашнего вечера = since yesterday evening
• с прошлого вечера = since last evening

In many contexts they are very similar. However:

• вчерашнего explicitly connects it to yesterday
• прошлого means last/previous, which can sometimes sound a little more relative to context

If the speaker literally means yesterday evening, then со вчерашнего вечера is the clearest choice.

Yes, статус is a normal Russian noun. It can mean different kinds of status depending on context, for example:

• the status of an application
• an order status
• a relationship status
• a system/process state
• someone’s social or legal status

In this sentence, it most likely means something like:

• a progress status
• an update status
• a system or request status

So the exact meaning depends on context, but the grammar of the sentence stays the same.