Several reasons:
Never open with Embolden into damage oGCDs. Prepull Acceleration into a long cast should always be the way to go unless you're having to Jolt instead. Embolden is better a bit later aligned for party burst. It also does nothing for the damage oGCDs as they are all physical so the highest stacks are wasted.
Swift should never be used for the opening 1st GCD, although with C6 -> Fleche we're already behind.
The string of OGCDs is extremely GCD inefficient and is a big dps loss just from the GCDs it's not rolling.
CAC and Displacement are not used prior to Manafication resulting in further potency losses due to Manafication's resets overwriting available cooldowns.
You can adapt the current opener down, or use the original Stormblood era openers since the core of RDM did not change. All you're missing are certain pieces but the core remains the same.