Sounds like you’ve been pushing up stuff you could have just been riding up and down on on a “normal” bike?
Some “proper” DH tracks really don’t need a “proper” DH bike, but can be more forgiving doing repeated runs. Some tracks I’ve ridden on a 160mm & felt a bit out of my depth on, some I really wouldn’t fancy without the get out of jailness of 8 inches of travel
There’s a good chance you ride a lot more smoothly than others without the BMX background so don’t *need* the bigger bike as much?