My mother is always telling me about the kits she's using, which have lights and stuff integrated. But the units are so tiny that it seems like suddenly the plants need to go in the ground NOW or they just
poop out. It seems to work for her, but in the past they never worked for me either.
Something else I've noticed is it seems like you have no idea how old those kit seeds are-- she's given me some leftover seeds from kits and I occasionally throw them out in my beds when I go on a planting blitz and then a month later realize, hey, not a single thing came up. Hmmm.....
Still, your profile says Wisconsin, which tells me you could probably use some extra growing time. Keep on trying! Every season is a learning opportunity, and eventually it will work.