To the OP,
I was evangelical Protestant for over 40 years, and came into the Catholic Church five years ago.
It would be better strategy, if I may use that term, to approach Protestants by praising the good things in their fellowships rather than mourning the lack of good things.
Evangelicals will respond to this approach, but they will repulse the approach that you used in the OP. They will go on the defensive. And they probably know more about the Bible than you do and will quickly confuse you to no end. The door to any further evangelization will be slammed shut.
But if you concentrate on the good things, they will warm up to you, trust you, admire your faith in Jesus, and possibly even listen to you talk about Catholicism. You will leave the door wide open, and even if you are not the Catholic that the Holy Spirit uses to convince them to take a serious look at Catholicism, the open door will make it easier for the Catholic that the Holy Spirit DOES use to evangelize them.
There are plenty of good things about Protestantism, especially evangelical Protestantism (I’ll admit that I’m biased!

).
Yes, they do have a great big family, and many times, that family is friendlier and more sacrificial than many Catholics. I saw many acts of love and charity while I sojourned among the Protestants, acts that would make even Mother Teresa of Calcutta smile in approval.
And yes they do revere their past heroes of the faith, even if they don’t ask these brothers and sisters who have passed on to pray for them.
And yes, they DO have the Bible and are very diligent to study that Bible and memorize it, unlike many Catholics who only take it out once a week during Mass.
You know, a lot of Catholics brag about having the ENTIRE Bible. But I wonder how many of those Catholics have read and studied the Deuterocanonicals, or even know where they are in their Catholic Bibles? One of the first things that I, as a good evangelical Protestant, did when I was studying the Catholic Church was to READ and STUDY these books. (For those Catholics who have read and studied them please forgive my generalization.)
Evangelical Protestants have fantastic (alcohol-free! YAY!) fellowships and socials, good solid schools, beautiful music, a network of foreign and local missionary organizations and parachurch organizations, and well-educated pastors and teachers.
They have Dr. James Dobson, a champion for righteousness in this world. And Rev. Dr. Billy Graham, a man whose preaching has literally brought millions of people all over the world to the foot of the cross. And Corrie ten Boom who lost four members of her family as they helped Jews hide from the Nazis.
OP, I recommend this approach. Study the Chapter in Acts where St. Paul preaches to the people on Mars Hill. He didn’t criticize them for what they lacked, at least, not at first. He started his brilliant sermon by praising them for their religion and their diligence in seeking God.
It’s a good lesson for all of us–build the bridge before you try to make anyone go across it. Maybe if more Catholics built the bridge–Protestants wouldn’t have to SWIM across the Tiber, but instead, we could walk (or run!) across the bridge to Rome!