Is a non-apple lightning charger bad for an iPhone 5?

My roommate bought me a non-apple lightning plug and I was wondering how that could affect it. It is slightly larger than the original, but only people that know apple products well would be able to see the difference. Because of this you have to push the plug in, and then pull the plug hard. It gets almost stuck. Is this going to be bad to use for my phone? I've only had it for less than two months.

It is kinda bad but if you already used it and nothing happened I guess it's ok. Please answer my question!

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