Difficult client rant: guy insists on DIY PEX but blames me for leaks

So I get called out to this job where the homeowner had been messing with his own PEX lines, using those cheap expansion fittings without a proper tool. He watched a few videos and thought he could handle the repipe himself, but now everything's leaking under the sink. I tell him straight up, you gotta use the right crimper or expander like the Milwaukee M18 for PEX-A to avoid this crap. He gets all pissy, says I should fix it for free since I'm the 'pro'. Saw a similar story on r/Plumbing last week about these know-it-all clients. Anyone got tips for dealing with this without losing your cool? In the Plumbers United group, they say document everything from the start. TBH, I'm tempted to just walk away next time.

Nailed a similar job last month, turned it into a full repipe and the guy ended up thanking me.

Document EVERYTHING with photos before you touch it, saves your ass in disputes.

Ugh, same here brother, these DIYers think YouTube makes them experts.

Felt that, had a guy blame me for his botched SharkBite install.

These homeowners are the worst, always wanna cut corners then cry foul.

Man, collective BS from clients like this is why I started turning down DIY disasters.

Pissed me off last week, spent hours fixing their mess and got a bad review anyway.

Sorry man, been there with the PEX nightmares too.

Yeah, it's exhausting dealing with entitled types.

Hang in there, we all get these clients eventually.

Never assume they're telling the full story, always inspect first to cover yourself.

Try quoting the full fix upfront, shows them the real cost of their shortcuts.