it is possible that 2+3 have bent valves, but it would have run rather poorly.
probably worth doing another compression test, quite easy to rig up a battery to the starter motor - even with the engine sat on the floor. Just bolt the gearbox back on so the flywheel does not catch on anything. Ideally you should remove the throttle body or keep it fully open during the test. Ensure you have a full sump of oil !