Luckily I never fell for the subs4subs thing. In my 2 months making videos, I only received some subs4subs requests and the "hey get a chance of shoutout for thousand subs" messages at the beginning, but every time I turned them down and said why I thought that was a bad idea. I haven't received any similar message for weeks, but if someone is going to do that now I will just report their comment as spam and hide their messages from my channel.
I don't think it's too late to backtrack now. If you create quality content and promote yourself in a good way, both subs and views will come