DH is driving me up the wall. He insisted on buying parts to fix the central heating and doing it himself, with the aid of YouTube videos.... He has no experience or qualifications in plumbing. He has replaced the pump and a valve and broke a stopcock/tap in the process. He's just gone to Wickes. I feel like running away. Why can't we just pay someone who knows what they're doing?! I've tried having this conversation, but he sees it as some sort of affront that I don't have confidence he will do a decent job - and is mean as hell and doesn't want to pay. He spent also spent half the day "cleaning out the garage" which consisted of putting all of the garden tools and an old car seat and various other things outside in the rain, and then abandoning them when the part for the central heating arrived to start on that job. I am at the end of my tether with it. How can I make him stop?!