As said above, i was focusing on reasons that stop you from getting new readers.
When a story is bad(and i don't mean the grammar), people will comment/review the webnovel, especially if they are strongly disappointed. The more engaged they are, the harsher their words( Of course there are also stupid mean readers). So basically, if you can't get enough readers, you have to look for things you can easily fix. Because indifference is the worst.
Verb tense consistency is truly easy to fix when you get the trick, same for punctuation issues.
For the novel title, if you're not contracted you can basically rename it the same with (edited) in brackets, or just change a letter or something like that. It has been done more than once, for example for people that wanted to participate to the Spirity Contest.