Trouble Tenants...I'm Overwhelmed

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I own a SFH in California which I rented out October 2018. Since day 1, the tenants have been contacting me on a daily/weekly basis requesting repairs.

Some of these repairs are warranted (replaced the water heater, fixed broken windows, fixed faulty sprinkler valves) while others I feel are not (most recently the light bulb in the garage isn't working). 

I've spent well over $5,000 in repairs since they've moved in (it's only been 9 months)  and honestly I'm sick of this. What's worse is that they find fault in many of the repairmen I send over. These are licensed individuals whom I have been working with for over a decade who are loved by all other tenants except these.

Most recently, there's apparently a slew of electrical issues in the house, including a few outlets that don't work, the A/C not cooling, along with the faulty lightbulb in the garage. I sent my electrician to take a look and over the course of a week, between he and his team, they fixed the issues...or so I thought. This morning the tenant contacted me and told me they're still having issues and that the electrician didn't fix everything and that he didn't show up when he said he would. I told them it's their responsibility to make sure all the issues are addressed with the electrician before he leaves to prevent consistent visits over the same problems and to follow up with him if he didn't make the visit.

They proceeded to get mad at me and my electrician, saying that it's not professional for the repairmen to forget what he needs to fix, that I'm blaming them, etc. I've been trying my best all these months to give them the benefit of the doubt and I've worked diligently to fix everything they've brought up within a few weeks time max, but I'm sick of making repairs, I'm sick of being contacted nonstop, and I'm sick of these people hating on my repairmen.

Not sure what my question is here, perhaps I just need to rant to fellow landlords, but any advice you can give with regards to dealing with such tenants would be appreciated.