Hi there and welcome
Dell is a good brand, but as with any brand some models are great and others not so.
Can you tell me the brand of the inspirion you have please?
It is actually a very good Laptop, and they never come fully charged, so that is expected.
What I advise is you reinstall it all again, to do this, click on start, Settings, Update and Security, Recovery.
Then choose Get Started under Reset MY PC.
Once done, follow the steps to delete all data and reset the PC and you can set it up again like new,.
But this is a very good computer.