Chenille can be a real bear
to work with. It doesn't give at all, and sometimes causes pain to your hands if you knit with it for a long time. Also, after the knitted item sits for a while, the stitches will sometimes "worm" loose and hang funny. But, it makes a nice, lush fabric, so it can be worth the trouble if it's what you really want.
And you've learned one thing about knitting. Different yarns require different techniques, or different needles. Just part of learning the craft.