>>1030285I've ridden big miles for years with a poor fit and it's doable, but you are fucking your body up and limiting yourself. Now i'm 8 months into a knee injury and only just starting to ride much again. It's probably going to be a lifelong issue. I wish i hadn't ignored my body for so long.
If all a fit achieves is small comfort and efficiency improvements, it's worth it, but it might also save you from serious injury. Your setup with the saddle slammed back and tilted upwards looks very wrong and combined with such a relaxed front end, must be extremely poor for generating power on the flat. I don't think you'd be merely finessing your fit, it looks completely off.
Free from a shop you know or cheap from an unfamiliar shop, ~15 minutes discussing things with a pro is a good idea.
>650km weekReally? That's a lot of riding. IMO anyone riding seriously on a road bike should pay for a proper fit. There are charlatans and snake oil to avoid but it's worth seeking out.
pic related, a shitty fit