Agree with all above, it's the wraps that let them down. I used the prefolds and wraps on dd1 nearly all the way to pt with just the addition of two different wraps at the end. I had leaks, wicking, chafing on her tummy from the Velcro but found ways round it and managed.
I use the same prefolds now on dd2 with thirties duo wraps and I ve never had I leak from them, no bf poo explosions have made it past the gusset of the thirsties duo wrap.
I ve also used fleece liners instead of the paper this time and would never use paper again.
I find prefolds really simple to use.
Good puck with yours hopefully they ve updated the wraps since I bought mine 4 years ago. I think they re still cotton outers which I find wick more easily on my kids.