And some things don't need professional quality. Did my own plastering for some patches of wall. Is it as perfectly smooth as getting a plasterer in? Maybe not if you look very closely. So just stop looking so closely at the wall. Plus learnt for next time if I need to do it again I can probably do a somewhat better job.

I commend you for that. I have no problem with anyone fixing their own things. My only gripe is fixing other peoples mistakes. 35K espresso machine breaks, catastrophically, I spent a week fixing it as I've never seen this kind of damage. Then basically spent a few hours interrogating the customer if they changed the settings. Finally they cracked and said yes, the milk wasn't working so they turned it off. They didn't. So the entire system kept running and created calcification all throughout the path and blew out all the connectors on the boiler. I should have charged double for that experience; hence why I don't feel like doing that line of work anymore.