Few months ago I was chilling in front of my computer's monitor, basically doing nothing for a wholentire days and weeks.

You don't need put a in front of plurals.
Also to me entire sounds better that whole.

It was nice, it felt good, I regretted nothing.

be and feel are in past simple, but regret is not?

And I can't accomplimenthieve any of that by staying who I am I today.

A few months ago, I was chilling in front of my computer monitor, basically doing nothing for a whole days and weeks.

"days and weeks" is plural, therefore you would have to use "some" instead of "a". But, without it sounds the most natural here.

It was nice, i. It felt good,. I regret nothing.

A lot of English-speakers tend to put commas where they don't belong. Perhaps to create these sort of natural pauses in writing, but they don't make sense grammatically. Either a conjunction, like "and," or a different punctuation, like a semicolon, would work well to connect everything into one sentence.

Here, to emphasize the repeated short clauses, I would use periods. But, TBH I am super nitpicking and this is barely a mistake.

Maybe, I catch this desire from others this desi, who were, raised by capitalism, to have more,- to do more.

It's not very clear who was raised by capitalism here. Was it the "others" or "this desire"? I think, by using a few too many commas, you confuse what the subject is of this "raising".

But the sentence sounds very pretty and poetic.

And I can't achieve any of that by staying who I am I today.

Thoughts #1

FA few months ago, I was chilling in front of my computer's monitor, basically doing nothing for a whole days anddays, even weeks.

1) Any sentence that begins with a time, like "Last year," "Yesterday," etc. need a comma afterwards.
2) You can say computer monitor, computer's monitor sounds weird
3) You can say "a whole day" (meaning an entire day), but you can't say "whole days", so I changed it to "days, even weeks". That means you were basically doing nothing ranging from a few days to a few weeks.

But now – I'm drowning in guilty.

I don't have any ambitionous goals or high expectations for my life.

I think that my biggest personal the largest value is „primum non nocere”.

I don't harm anyone by scrolling Twitter over and over again, so why it'ss it bothering me that much?

Maybe I'm not being honest with myself.

It sounds smoother when you say "being honest with yourself".

Maybe I catch from others this desiget this desire to have more and to do more, raised by capitalism, to have more, to do moreby others.

Sounds smoother this way.

And I can't accomplimenthieve any of that by staying who am I today.