Just so you are aware, in reality all the points you listed are exactly the results of what you are describing. It becomes a one man show because anyone compet

Just so you are aware, in reality all the points you listed are exactly the results of what you are describing. It becomes a one man show because anyone competent is going to run away from that mess right away. New features become exponentially slower with time because you are re-implementing some ad-hoc SQL implementation in JavaScript of all things. Initial performance is fine on your device setup, but drastically slows down over time when you pull in more data and do more complex things. As someone else pointed out, you could benefit from actually learning SQL. There is a reason it's used.