My understanding is the leadership is elected. Committee heads are chosen, usually based on longevity, to head their respective committees.
That’s why it’s so hard to oppose Bohner. He chooses committee heads and paybacks can be harsh.
Opposition to Boehner as Speaker should be because the budgeting, outflows should be cut to below levels of inflows, we have debt, substantial debt.
But I don’t doubt Democrats will vote for him to perpetuate their fraud.