Any manifestation, good or bad, is what we attract based on our subconscious intentions. We may consciously say we desire a thing, or have a conscious intent, but our subconscious beliefs do not think we can have it, or deserve it, etc... This is how we seem to manifest "bad" things or circumstances.

I had to check this out when I realized I asked nearly the same thing the other day haha. I've had similar experiences and I know the majority of people would say that "anything negative that happens you've created with your doubt, fear and contradicting thoughts" which I do believe for the most part. But when you're consistently feeling positive, doubt free, fearless, etc. and the majority of the time you're practicing these laws correctly and something negative happens, I can't bring myself to believe that it was deliberately created by you EVERY SINGLE TIME.

I believe, as you said, that supposed "negative" thing could somehow lead you to your desire in ways that are yet unseen that will unfold in due time if you stick with these beliefs and don't give up. Or the latter, could be you're not ready for the full blown manifestation of what you're wanting and said "negative" event may cause you to do some self reflection, self evaluating and prepare you to enjoy it in it's fullness when it gets to you.

If that's the case and some soul searching or a better understanding is required I wouldn't even hesitate to say that it may be an actual shortcut to your desires, since in these rare cases you have no other choice but to either "get it together" or, what most do, retrogress back into old beliefs of being powerless and grow bitter (which would slow you down trememndously depending on if you stay in that mindset).

Just an example, Say there is some unresolved fear in your mind that you've been avoiding taking care of and in some way if that manifestation came to you while you still have these unresolved issues, you're actual fear of losing that could push it away after you've gotten it, whatever it may be. In which case this negative event at this point in time could be the key for this to not happen and for things to go smoothly and even better than you could've imagined, since after all you'll be a better person in the midst of enjoying your desire. Do you see what I'm getting at? Something to consider. I'm in a similar situation and didn't recieve any direct answers to my question, so thought I'd give you some ideas I had while wondering about this lol.