Protestant faiths in and of themselves don’t turn people away from God.
HOWEVER, the disunity among Protestantism (the fact that any Protestant or Baptist can found their own church on their own ideas) has the potential for churches that are overly materialistic or strict or hedonistic or otherwise un-Christian.
One example is Televangelism; in theory the idea of using technology to reach a larger number of followers is a good one, but in practice many televangelists use their shows to ask for money and proceed to spend it on themselves.
In an organized, structured church institution, potential priests can be vetted and bad ones (sexual predators and deviants, closet-atheist con artists, alcoholics, etc) can be rooted out.
But when ANYONE can make their own church, then there’s nothing stopping opportunists from founding one just to cash in on genuine faith.
Even when someone founds their own church with the best of intentions, their beliefs might be just plain bad. Churches that teach that your automatically going to go to Heaven once you accept Christ (even if you continue to commit major sins or otherwise turn away from Christ after the fact), Churches that teach that God already decided whose going to Heaven and Hell and that your actions have sway over the decision (with being born rich being taken as a hint that your destined for Heaven), Churches that allow Abortion (because convince is more important than human life apparently), and other such churches are examples of how things can go err when anyone can found their own church.
But if someone belongs to a Protestant Denomination run by people with good intentions AND following biblical rules, then they should be safe.