What's wrong with this circuit built on opamps?
It's likely nothing to do with your circuit, but to the internals of the opamp model. Sometimes manufacturers do quite 'exciting' things in their model to get it to simulate some edge case better. A long wait before it plots, or 'timestep too small' error generally means it's trying to solve around time constants that are too short.

You could try using a generic opamp in the simulation with just the key limitations you're interested in, for instance the headline GBW and offset currents from the amplifier published data sheet. Once you have something 'ideal' plotting, then try complicating that opamp, or substituting faster models.