i am settled here in Pakistan and work online
That's a contradiction, of sorts. If you work online, then you are settled not only in Pakistan, but in any other country where you have access to the internet, including Poland. Your reasons for returning to and staying in Pakistan are therefore not convincing.
how can we overcome this objection
You would have to clearly demonstrate, with abundant documentation, that you have abundant reasons to stay in Pakistan, of course, and that you would lose out by failing to return to Pakistan when your visa runs out. You would have to demonstrate that you have very strong ties to Pakistan that, if severed, would pose severe hardship that is greater than any possible benefits of staying in the EU. And, as I said, those ties would have to be backed up by abundant solid official documentation.
This is not a court of law, where you are presumed innocent until proven guilty. Quite the opposite. The burden is solely on you to prove that you have every reason to honor the terms of your visa. From what you have written here, that's going to be difficult, because one of the most important reasons for returning home, your source of income, is not dependent on your physically being in Pakistan.
You would also have to prove that your marriage to an EU citizen is genuine and was not entered into with the intention of entering and staying in the EU. Again, it's a case of guilty until proven innocent.
Frankly, nothing in your post that indicates that you have strong ties to Pakistan and intend to leave the EU when your visa expires, or that your marriage is genuine.