No, this is not why impeachment exists. A president is impeached for "high crimes and misdemeanors". If the Prez is acting legally, I can't see how he could be impeached for it.
Rather, this is what voting is for.
Rather, this is what voting is for.
DOJ regulations pretty much prohibit bringing criminal charges against a sitting President.
Whether or not people think the impeachment process is a political sham is a different question/problem. Recently, it largely has been - both with Clinton and with Trump, for very different reasons. Even more so now with GOP members threatening to immediately impeach Biden (for what, I can't quite figure out) should they win back Congress.