Once upon a time every erc20 token was a scam, that was the way of newbies that came into crypto space in 2018 ( bear market ) they probably make one or two investments that doesn't do so well as they hoped for, I wouldn't have made my 12,000$ in 2021 if I believed that all BSC projects are scam...learn to do research first before saying such statement.
It means that you have learned a lot about everything in the past and also in the present because the ERC-20 token in 2018 is a trash token which will eventually become a scam and the BSC token whose owner is not clear will also become a scam in the end so it is actually already almost similar to the past although you are late to realize it now.
When a project is not working as expected, there is the possibility that the developers will decide to abandon it later on because it is not what they wanted it to be. Unless maybe miraculously there happens to be a way for the project to survive and get better.
There are so many projects that are being released like every day in the cryptocurrency market and you wouldn’t even know what you would choose if you should be looking at all of them. And then another thing is that is not all of them are going to be successful, few are going to be successful, but not all of them. So that’s why you have to be careful with investment in the DeFi market.