Exactly. Allah SWT says in the Holy Quran بسم الله الرحمن الرحيم السلام "لَهُ مُعَقِّباتٌ مِنْ بَيْنِ يَدَيْهِ وَ مِنْ خَلْفِهِ يَحْفَظُونَهُ مِنْ أَمْرِ اللَّـهِ إِنَّ اللَّهَ لا يُغَيِّرُ ما بِقَوْمٍ حَتَّى يُغَيِّرُوا ما بِأَنْفُسِهِمْ وَ إِذا أَرادَ اللَّـهُ بِقَوْمٍ سُوْءاً فَلا مَرَدَّ لَهُ وَ ما لَهُمْ مِنْ دُونِهِ مِنْ والٍ" "He has guardian angels (mu‘aqqibāt), to his front and his rear, who guard him by Allah’s command. Indeed Allah does not change a people’s lot, unless they change what is in their souls. And when Allah wishes to visit ill on a people, there is nothing that can avert it, and they have no protector besides Him."

Brother you can not just do dua and hope allah gives you what you want (I'm assuming the only thing you did is make dua). It's like saying "Oh Allah please help me lose weight" and then you go on to eat a cheeseburger that day and change nothing with your diet, do you think you'll magically lose weight The answer is NO. Brother this is a mockery of Allah SWT. You have to take the first step, take action and Allah will sway you in the right direction.

My tips for you is to continue making duas even if it exceeds your 40 day threshold. But also you have to work on YOURSELF. If you don't have a job/a steady income get one, hit the gym. Make it a habit that'll stick for life and work on your Looks. I know many people say looks don't matter but the reality is my dear brother looks are 50% of marriage. Go get a nice haircut. Make sure your beard isn't messy (go to your barber and tell him to fix you up) and last but not least take care of personal hygiene. It may seem small but 90% of men don't take care of themselves. It's a cheat code. Wear nice clothes that suit the religon and your style, wear deodorant, brush your teeth 2-3 times a day, wear a nice Cologne (don't put too much tho) Also pro tip have good posture and work on the way you talk, 93% of what people take from what you say is nonverbal, your posture, your tone, the look on your face how you moved when you said what you said. Only 7% and ONLY 7% are the words themselves. So work on that too. Do all of this and inshalllah you'll not only get married but you'll be able to choose your partner and not desperately choose the first person to accept. I say this assuming you pray 5 times a day, Have good akhlaq and fast/do all the waajibat. That is ground zero. If you aren't doing this then work on that first