Acceleration issues chugs and jerks every now and then?

My truck has issues when accelerating. It chugs and jerks every now and then when speeding up and the issues only seems to get worse. I stick with unleaded fuel but if you put super unleaded it gets worse. The check engine light pops on and off but now it’s not coming off. When you accelerate and it jerks, if you press more on the gas pedal it stops. It’s sometimes idles rough and shakes. A family friend believes the catalytic converter is getting clogged but I’m just not sure. It’s the Harley Davidson edition if it matters.