My current headphone iss are falling apart; the foams is fraying and the painting are is literally turning into dust and sticking all over my head.

Some issues with plurals vs singular here. Unforunately when using "to be" it sticks out more clearly as the verb changes in conjugation, depending on the amount of things it is affecting. Headphones are always plural, just like the word "trousers" and in this case both 'foam' and 'paint' are uncountable nouns.

That's why I don't use ithem anymore.

Plural again, because it is the headphones.

Instead, I use some cheaper earbuds that I bought on Aliexpress (before they started charging abusive fees).

I would opt to add "some" here to add clarity to the sentence. It isn't necessarily wrong not to use it, but it reads more fluidly for me this way.

SWhile searching up on Reddit, I found a mic with a really impressive quality, and I might be able to afford it as well.

Searching doesn't always need up and here it wasn't necessary. "To search something up", is to look for it in a dictionary or a book.
For the "might be able to" part - you must indicate an ability to do or not do something after might. This is done using "I might be able + to [verb]".

It isn't an essenctial investment tofor my life since the only purpose of purchasing it is onlinefor talking online, but I think It would be nice to gift it to myself as an end-of-year present.

My current headphone iss are falling apart; the foams is fraying and the painting are is literally turning into dust and sticking all over my head.

Esse imagem é tão engraçada kkkkk

Searching up on Reddit, I found a mic with a really impressive quality, and I might be able to afford it as well.

But I think I'll wait until Black Friday is out so I can get some discounts on it.

It isn't an essenctial investment to my life since the only purpose of purchasing it is online talking, but I think Iit would be nice to gift myself as an end-of-year present.

My current headphone iss are falling apart; the foams is fraying and the painting are literally turning into dust and sticking out all over my head.

headphones - plural - as you have two ears. As plural needs 'are'. Foam is uncountable no plural form. The word is not 'painting' but not sure exactly what you did mean. If it were 'painting' it would be 'is literally'.

That's why I don't use ithem anymore.

'them' as headphones is plural.

Searching up on Reddit, I found a mic with a really impressive quality, and that I might afford it as wellbe able to afford.

But I think I'll wait until Black Friday is outstarts so I can get some discounts on it.

It isn't an essenctial investment to my lifetem, since the only purpose of purchasing it is online talktalking onlinge, but I think Iit would be a nice to gift myself as an end-of-year present to myself.

Changed the end of the sentence as it sounded a bit repetitive with gift and present.