I've been climbing consistently (3-4 times per week) for 10 months now. But I still have a problem, getting pump. Depending on the climbs I am projecting, sometimes I am pulley pumped withing 30-40 minutes. I'd say average is 45-60 minutes and then I am usually finished my session. It's usually not that big of a deal, I feel my progess is fine even with shorter sessions. But sometimes I want to climb more.

It seems this hasn't reduced since I started nearly a year ago, I take even longer breaks now between attempts than ever because the projects and grades are harder and harder. Climb V3-4 and project v4-5.

I even started doing pull ups at home on a doorway pull-up bar once a week (or at the gym at work once a week)

How do you avoid getting pumped so quickly?

Edit: I do 10 minutes of stretching and mobility and 10 minutes of easy climbing before starting. I'm 30 years old, very little activity prior to climbing