hey can you help me make a really op synchro deck????

Well, it depends on what kind of Synchro's you like :)

A combination of Zombies/Lightsworn is very good, although the "Dark Synchron" decks
are also very powerful.
But there not easy to play (in my opinion).
There are also more Blackwing types of Synchro decks... also very good !

Decisions, decisions ... 🙂

Here you can try my Red Dragon Archfiend deck it's pretty strong I guess you can make something similar.

Monsters

3x Red Resonator
1x Dark Resonator
1x Chain Resonator
2x Synkron Resonator
1x Red Nova
2x Red Sprinter
2x Red Warg
1x Red Mirror
1x Red Gardna
3x Primitive Butterfly
2x Kaiser Vorse Raider
1x Quickdraw Synchron

Spells

3x Resonator Call
1x Tuning
1x Upstart Goblin
2x Return of the Dragon Lords
2x Twin Twisters
1x Raigeki
1x Soul Charge
1x Foolish Burial

Traps

1x Red Carpet
1x King's Consonance
1x Solemn Warning
3x Call of the Haunted
1x Bottomless Trap Hole
1x Grand Horn of Heaven

Extra Deck

Hot Red Dragon Archfiend
2x Scarlight Red Dragon Archfiend
2x Hot Red Dragon Archfiend Abyss
Hot Red Dragon Archfiend Bane
Tyrant Red Dragon Archfiend
Hot Red Dragon Archfiend King Calamity
Red Wyvern or Red Rising Dragon
Dark Highlander
Ultimaya Tzolkin
Crystal Wing Synchro Dragon
Stardust Spark Dragon
Black Rose Moonlight Dragon
Stardust Charge Warrior