It is not unusual what you are feeling. We all remember than initial intense suppression. For most it doesn't last as you body gets used to the medication, you can increase dose/cost, but even at 15mg it wears off eventually for some
No one knows if injecting regularly more frequently over stimulates your receptors making the medication less effective over time, or if it over stimulates your gallbladder, pancreas or other organs increasing risk of uncommon, but more serious, side effects because it has not been trialled that way. You would be doing this without medical oversight. Why take the risk?
Or hold off being an armchair pharmacist, and try to build the habits and patterns of eating in the first 5 days of the week, high protein, fiber, minimal UPFs/sugar/sweetener, food you need to properly chew will all help with those cravings. Keep the cupboards free of food you crave and snack on (difficult this time of year) and the fridge full of protein for snacking (roast chicken, hard boiled eggs) and eat those first. Stay well hydrated.
Look at calorie cycling so you stay in deficit over the week. I have a well chosen takeaway towards the end of my week - smaller portion, but still have and enjoy it guilt free as I know I am within my deficit over the week.
No one said it would be easy, and it isn't, but think long term how medicated weight loss and eventually maintenance should look - relying on it 100% imo (obviously others will have their own opinions, you need to build your own) will not bring long term success.