You set three alarms. You meant it. And still the sun was up before you were, and the first thought of the day was that you must not care enough. Before you accept that verdict, it is worth knowing that the Prophet ﷺ described this exact morning, and he did not describe it as laziness.
The three knots
He ﷺ said that Shaytan ties three knots at the back of the head of each of you when he sleeps, striking each knot with the words: "Upon you is a long night, so sleep." If a person wakes and remembers Allah, one knot is untied. If he performs wudu, another is untied. If he prays, the last knot is untied, and he begins the morning lively and in good spirits. Otherwise he begins the morning in a bad mood and sluggish.
Sahih al-Bukhari 1142
Notice the shape of it. The knots are undone one at a time, by three small physical acts: remember, wash, pray. You don't have to feel more sincere at 4:37 AM. The heaviness you feel is described here, not blamed. And the way out is a sequence you can perform while still half asleep.
Why louder alarms stop working
Fajr often falls in the deepest part of the sleep cycle. In that stage the brain is very good at keeping you unconscious while your body still handles small tasks. Reaching an arm out and pressing a button is a small task. Deep sleepers do it routinely and remember nothing, because memory is not being written at that moment.
So a louder alarm mostly trains you to silence a louder alarm. Volume raises the cost of the interruption, not the difficulty of ending it. The sleeping brain solves the problem in the cheapest way available. If the cheapest way is one motion of the hand, that is the way it will always choose.
Why distance works
Putting the phone across the room changes what the alarm demands. Now silence requires standing, balancing, walking, and being upright for several seconds. Those seconds are the whole point. An upright body raises heart rate and blood pressure slightly, and that shift is enough to lift you out of the deepest stage into something like awareness, the state in which you can decide.
It also breaks the loop of the person you do not recognise. He can swipe. He cannot walk. By the time you are standing at the far wall, you are awake enough to say the words of remembrance, and the first knot is undone. Then the tap. Then the prayer.
Pair it with an honest bedtime, and you have removed most of what was actually standing between you and the prayer. Not your love for it. Not your seriousness. Two feet of floor and an earlier night.
If you missed it this morning, nothing is over. Tomorrow is another attempt, and Allah knows best.