First, Parenting does NOT come with a Manual or directions how to be one , so most go it by the seat of their pants and it's is not an easy job so you can bet your Mom is doing the best she can. Also whether bad or good she will always be your Mother so love her as such and if you think you can do better wait and you'll see one day
Not sure what you are looking for because you really didn't ASK a question .. Just made a broad statement.
To add comment to that ... Your mother could very well be a 'bad' parent ... And that could be for many reasons. It could be because SHE, herself, didn't have a role model when SHE was young. She had no one to look to for guidance. Children often live by example. If she had either a bad example or none at all, that could plausibly affect her own behaviour.