I don't know that you did anything wrong. Were the bulbs close to other vegetables? They should not be; as there is the ethylene gas problem which makes bulbs inert. Could you have overwatered? Perhaps they were in a too warm room; or did you keep them outside? Were the bulbs quality bulbs or baragain types? Maybe they were not good to start with!

Were the bulbs close to other vegetables? They should not be; as there is the ethylene gas problem which makes bulbs inert.
Nope

Could you have overwatered?

Well, I think underwatering could have been a possibility for me but my sis and mom just kept them moist

Perhaps they were in a too warm room; or did you keep them outside?

Inside. My place was generally in the 70's but both my sis & folks have the temp drop into the 60's overnight and about 70 or 71 for the day.

Were the bulbs quality bulbs or baragain types?

Got them from, Lowes but they were goodsized bulbs and nice & firm.

Underwatering is rarely a problem with bulbs when you first start out. The questions were for you to consider whilst going over your process.

Light could also be a factor: sometimes too much too soon is a problem; depending upon the type of bulb.

Most forcing bulbs are best bought from a bulb broker; who prechills them, and they are developed for indoor forcing especially.