No tug, no umph

While doing jelqs I don’t feel a tug at all, should I feel a tug?

Yes.

you should feel the tissues in your penis expanding, a slight pressure.

What could be the problem?

Are you doing wet or dry jelqs? What is your erection level? What lube do you use, if any. How hard do you squeeze while jelqing?

I assume you warm up first? Grab the penis as deep in as you can (get in that fat pad) and then try to jelq downwards. If you perform the technique correct you might feel a good ligament stretch as well.

I do wet jelqs, I perform at about 40%-70% in erection level usually. I use Cetaphil moisturizing lotion. I believe I squeeze pretty hard.