I had that problem with Varathane recently, I ended up sanding it off and redoing (you’re going to get a lot of gummy sandpaper.
What eventually worked for me was getting to a good finish before applying the varathane, 240-400 grit. make sure you wipe/blow all the dust off. I just applied it with some of the brown paper roll scrunched up, just using enough finish to cover the piece without getting any build up, leave it dry for a couple of hours. Sand it back slightly to smooth and recoat.
After the second coat is dry I rub it down with a 220 sanding sponge until it is like glass and it feels amazing.
Maybe test it on an offcut until you get the result your looking for