Haven't followed a program since i started going to the gym

[Warmongermain]

18m, 186cm, 84kg I have been going to the gym for about a year and a half now, but have never followed a program. I have put on a fair bit of noticeable muscle. I staretd off with no idea really of what to do, i used to go about 3 times a week and would just do basic exercises like bicep curl, chest press machine, thighs, abs and shoulders and triceps and back muscles every time i went. I did that for about 4-5 months. Then i started incorporating new exercises into my workout, and for about the past 5 months i have been doing a 2 hour workour with every muscle group (i think) 5 times a week.

This is what i do every time i go to the gym, 5 days a week:

Biceps curl machine - 45kg
Rope tricep push down - 35kg
Thigh press machine - 140kg
Weighted row pulls - 65kg
Abs leg raises (calistenics)
Pull ups & biceps pull up
Dips
Cable curl with rope
Shoulder press & inclined shoulder press machines
Chest press machine
Shoulder flys - 22.5 pounds
Skull crusher
Bicep barbell curls and backwards curls - 80 pounds
Neck muscle seated shrugs - 65 pounds
Calves machine
Chest fly machine
Seated leg curl
Inner thigh machine (32kgs)
Outer thigh machine (32kgs)
Bracalus
Stairs machine
Treadmill

I usually do 3 sets of however many reps i can do, and do one extra rep on the third set.

I originally thought i didnt need aprogram becuse as long as muscle hypertrophy was achieved, they would grow. And i am happy with how much muscle i have, but im wondering if i missed out on potentially having more muscle, and if its worth it to switch to a program now if i want to keep getting more muscle mass?

Or should i change this workout up, or maybe split it up and add other things?? Or stick with it?

Also it is bad doing the same muscle groups so often?

[air2fakie]

If you want to make real gains, you should switch to a proper program. But if you're happy with your results, you can keep doing every single machine in the gym every day.