Can too many links really ruin ur ranking? If so how much is too much? Lets say for a website thats 2 years old.
It's not too many links that ruin it for you, it's the low quality (Spammy) ones that can do that. If you have natural links and quality content, the more the better.
if too many "spam link", then yes if our backlin is mostly quality link, then it will only help your ranking