You're not a lazy mother...but you must an exhausted one!
Few questions...you probably thought of them but here goes:
Did you make a big deal of the bed change? It's too late for that part now but if you did or stress it every night and stress she has to stay in it...she's at a GREAT age for doing the opposite or picking up on your worries. Have you considered just putting her in bed with the same relaxed routine you had with the crib. Even telling her..."you can play on the floor as long as you want..but you have to get in your bed later" and leaving it at that? (yeah...I know..yikes!)
How big is the "big bed"? Although our son took to a double bed (we are the lazy ones...we just had that around so we made that his bed). A bigger space with no barriers can be scary to a small child.
Have you asked her if she would like something changed in the room? At that age...change can be unsettling. Perhaps you could make a few other changes WITH her unrelated to sleeping.
Does she have a transitional object like a teddy bear, blanket etc...if not...have her pick one with you from the store and make it a big part of the experience.
Instead of fewer toys...maybe she just needs more toys with her on the bed. I mean quiet ones like a few books, dolls etc...It sounds like she was always an active night owl...perhaps she needs more alone, play time, even if she doesn't settle for a long time. But I would make one rule: NO leaving the room.
But would you be able to stand hearing her up and active for a long time? As in...ignore it unless you hear a problem?
Eventually, I think, she will accidentally fall asleep on the bed and like it but....most likely...she isn't ready for the big bed...can you put the mattresses only, on the floor. It might be less intimidating.
One thing we did...although it was for fun and a long time after our son took to the big bed (sorry...we got really lucky...first night)...was to set up a kid's tent on the bed itself and let him use a flashlight and light up toys to play with. That little "cocoon" might make her feel safer and cozy.
Lastly...if you haven't already...put the bed in a corner so there is only one side exposed. She may be afraid of falling.
Good luck!! Keep us updated.