Amplifier/Effect Pedals - Help Needed

[BiNNS]

So I recently picked up an electric guitar, amp and pedals for myself. The amp is a Fender Champion 20 and I have noticed that the pedals don't sound so great going through it. Distortion and reverb pedals. Is this is common issue with this particular amp? If so, can anyone recommend an amp that can handle pedals well? Keep in mind that this is just for me messing around in my basement and I don't want to spend too much. Thanks.