There's a trick to getting your Wikipedia articles or contributions posted. Wikipedia is like a credit card, if you have good credit then you can do whatever you want but if you have bad or no credit then you can't do what you want.
The other thing is that Wikipedia functions like a virtual world with actual territories over certain pieces of content. These territories or content niches are controlled by an individual or two so when a newcomer comes and starts making content contributions, its like declaring war on someone who invaded your territory.
If you want to get our contributions accepted in Wikipedia then you have to start small in that niche. Start by making simple edits to build up your influence, perhaps 1 - 3 per day by pruning dead links or updating link rot.
Then in a couple of weeks, move on to minor article submissions such as if you work for an automotive brand then you could update the stats on a new model or put a mention about a new plant species in.
By now, your user permissions would have been upgraded twice from a nonregistered user to a new then auto-confirmed user. Try to get more permissions added to your account, perhaps start reviewing bad edits and start flagging them. Try to show stewardship over a period of a few months to a several years on the content niche that you'd like to own.
After six months to one year, submit your contribution and see if it gets denied. It won't be denied now because by now you be considered an active member of the community who's contributed regularly by doing your part (click on any user in Wikipedia and you'll see their history of edits, awards, etc).