first find out if you're actually fast or slow
You might consider getting an inexpensive GPS and a free-tier Strava account. Then go out and record some of your rides, upload them to Strava and see how you stack up against other Strava riders to find out whether you're fast, slow or in-between.
150–200 km/week to me is respectable but not a whole lot (on-road, it's a lot if it's all/mostly off-road). You also say "quite a bit of climbing" but don't quantify (perhaps because you don't have a GPS?). Is it 3000 m or more a week in those 150–200 km? That would be "a lot".
Last edited by dorkypants; 08-26-20 at 03:33 PM.