Almost everyone believes in destiny - we romanticize about an ideal future in which we have obtained all the things which we fancy, the things which we desire, the wealth, the wife and kids, the nice house, the nice car, the prestige, whatever it may be. People who believe in God will say "oh God has a plan for your life" and never really think about what they're truly saying. You see there is a disparity that most people do not detect here, they unwittingly conflate two things that cannot be conflated.
If you believe that you have a destiny, that God has a plan for your life and that one day you will inevitably arrive at the ending of that plan then you forfeit your freewill. But if you believe that you make your own decisions, that your life goes wherever you choose, that every situation is the result of your choices, then you reject destiny and you scorn God's plan. You cannot have both of these. It's either you are free or God has a plan.
But believers never want to countenance this, they want to hold on to both of these and justify the disparity away. They'll say "well God gave us freewill, but he also has a plan for everything", with a straight face like they're not saying anything that's insane.
Suppose you're an architect, you've been making plans for other people's houses for years but now finally you want to make a plan for your own house. You lay it all out, you know everything about all the materials that will go into your house, every single little detail down to the very last brick. You know exactly how your house will look, it's in your mind, it's on your plan. You hand the plan over to the builders.
What happens next? You expect them to follow the plan to the letter, and to ensure that everything goes according to plan you actively and directly monitor and supervise every single thing, you're an expert that's been in this industry for years and years, under your watchful eye and guiding hand there's no way anything will deviate from your plan.
It's the same thing with God's plan. You have to understand this. If God has a plan then it can only mean that we have no freewill. If he wants things to go according to his plan and not wherever I woke up and decided they go then he must actively and directly control everything that happens in that plan. If he had intended for me to end up in one place and not the other, but I randomly decided on something completely different, then he'd have a problem, there are billions of us down here!
I'll give you an undeniable example from the bible. God sends Moses to Egypt to command the Pharaoh to let the people of Israel go, for they were slaves there for 400 years. However, God tells Moses "...but I will harden the Pharaoh's heart so that he will not let them go." He then explains to Moses that the reason he will do that is just so he has a chance to flex his muscle and show off his power to a bunch of ants, kill a few innocent children and cause untold suffering to an entire country's population through plagues and droughts and all manner of dreadful horrors.
So Moses rolls into town with his brother, commands the Pharaoh and verily the man refuses, God has hardened his heart. The first time it's understandable. But plague after plague he refuses, until his and countless other innocent people, children and babies are killed by God's angel of death and no doubt by the plagues. If you'd have asked the Pharaoh about his agency at that time he'd have dismissed you as a fool, he would have been under no illusion that it was anyone else's choice but his own. As far as he was concerned he was just being stubborn, not giving in to the words of some Hebrew orphan, not being intimidated by some obscure minor God of storms that no one cares about. He couldn't fathom that an all-powerful deity might be messing with his thoughts, with his mind, no.
But therein lies the problem, God is so unfathomably powerful compared to us that even if he were messing with our thoughts, we could never know. And there is no doubt that he is doing so, as we've seen with Pharaoh, and he would have to if he wanted things to go according to his plan. There are countless other examples, literally, all over the bible that show that we have no say.
And there you have it. If you believe in God (I don't) then you cannot believe in freewill, but if you believe in freewill you shun God's plan.