Many scoutmasters do not enjoy the start of a new Senior Patrol Leader’s term of office. The new youth leader has a lot to learn. The scoutmaster has to spend time teaching him the ropes, which may feel annoying, since the last SPL had gotten it all figured out. He had not required so much of the scoutmaster’s time as the new guy does.
Sometimes it is is useful to find an ally in getting the new SPL.
Clarke Greene recently posted a podcast about advice to a new SPL.
Take a look at the support materials and additional resources he points out.