1. Movies are non-canon.
2. You're using fail GT. Super 17 could sense where Goku was going to IT out from. Surfer has cosmic senses that make all of their ki sensing and other senses pale in comparison. IT will not work in any shape, way or form. Surfer can evade instantly and IT requires a moment to lock-on before porting. Goku won't have any time at all to use it before he dies, instantly.
3. You haven't proven in any way that they're more powerful than the Surfer, that they can resist his numerous powers and abilities, that they're anything close to his level of speed, that they can even compete with him in strength. You've proven absolutely nothing and you blindly claim the Z-fighters win.
4. Janemba's warping was minor and only pertained to the Check-in station itself. A ki blast was enough to destroy him and foul language actually hurts him. And you still can't prove any of them are anything close to having the speed required to even blink before the Surfer kills them.
5. Surfer doesn't need to galaxy bust to kill Brolly. Transmuting him is simple, opening black holes in his eye sockets will kill him, siphoning all his power away will end it, speedumping him into another dimension is acceptable and even time-travel is enough for him to go back and kill everyone.
6. Goku didn't destroy a dimension. That was all hyperbole and it was a game-field created by another person. Nothing at all about this stops the Surfer from killing him instantly in any number of ways that've previously been mentioned.
7. All negative energy was just from the DB's themselves and not even worth mentioning as it's still hyperbole and incomparable to the Power Cosmic as has been stated so many times.
8. The Z fighters have no advantages, not in any category. No matter how delusional you are, this simple fact does not change. These debates have been done dozens of times on numerous forums and websites and the end result stays the same; DBU still loses horribly to the likes of the Silver Surfer.
1. Movies are Canon in this case because they involve movie characters. LOL :D
2. Buu can absorb or transmute surfer, Buu uses Kaishin method of teleportation with requires no sensing.
3. Janemba warping was not minor it affected the ENTIRE SPIRITUAL UNIVERSE (aka EVERYONE IN THE UNIVERSE THAT HAS DIED IN THE LAST 100 MILLION YEARS, DRAGONBALL TIMELINE BEGAN IN 100 MILLION BEFORE AGE) . He also broke the Barrier between Hell and Physical Universe, which allowed them to go to Earth.
4. DBU has advantages, which is that Surfer cant beat Janemba & Buu.
5. You are under some false illusion that Power Cosmic = I win. This is wrong.
6. Saiyan Saga Vegeta Small Planet bust Level, Frieza any sized planet / multi-planet bust Level, Cell Solar System bust level, Broly Galaxy Bust level, Buu Solar System level (lowered it just for you, although it should be Galaxy).
7. Transmute Buu & he can transmute back , transmute a Saiyan and they can continue fighting in their changed form.
8. Black hole, Surfer wont get time to do this & Janemba & Buu can teleport or just survive it.
9. Janemba can slice Surfer in half with Dimension Sword and he will tag surfer by opening multiple portals and attacking.