OldLefty,
With last summer’s exceptionally low flows in much of the state, you may have lost more than just big fish, although they are usually the first to go when habitat shrinks and water warms. There are lots of stream sections or portions thereof, often downstream portions, that are marginally wild trout water: marginally Class A, marginally Class B, etc. Many are in a perpetual biomass cycle with a low point that can be very low. The low part of the cycle could have easily and prematurely been hit in 2020. These sections, possibly more than usual, may be starting over again.