A bonsai bought for a few hundred yuan grows uglier and uglier after a year of care

Two years ago, in the fourth week, I looked at many bonsai companions, and in the end they had no way out. Lacking any bonsai experience, the several-hundred-year potted plant began. In fact, I bought four or five pots, and two of the pots lasted half a year. Maybe I took the empty pots away from beside me. Then I went on.
At the end of the potted plant's life, bonsai are also quite interesting. Later, after two potted bonsai were abandoned, they only then started to throw them out, and so they began on their own. In fact, you cannot say they were left to fend for themselves, but they would not have bonsai. When bought back on impulse, it is not a bonsai. No matter how you water it as usual, nothing will happen. At present the potted plant is rather long, not like a bonsai. It looks like the stump has been picked up in the pot.
Think about the stumps and bonsai that our companions bought. The result of their entering the pit was tragic.
As long as the stump is good enough, now is a good time to buy it. Maybe this is why this family once pruned bonsai. Alas! Spend two years and see. In fact, if there is not enough food, assume that only firewood can be burned when it dies. I just want to say that after that, I could no longer afford to buy bonsai on impulse.