In that case they're playing the matchup correctly, they know they can challenge you after every feint, but you can also use that to your advantage.
If you know they're going to poke, feint and then block it. F3 immediately afterwards to take your turn back. If they try to press buttons after that poke, they'll eat the kick clean (unless they're maniacs canceling pokes into special moves lol).
Now they might be expecting you to be passive with your feints and block after each one of them. That's your chance to keep your pressure going. Or they might not learn and keep pressing buttons. You'll have to feel it out.
Feints are no guaranteed looping pressure opportunities, nor are they guarantees of you losing your turn. After every feint, both you and your opponent have plenty of options, you just have to keep adding layers to that mindgame while also avoiding being predictable all the time.
Jacqui is fun.