I bought a 2008 F150 from our son when he added 2 children and needed 3 rows of seats ... and only drive about 5000 miles a year. I got my first oil change some 6 months after buying it as he used some quick lube place who didn't use even semi-synthetic oil. The Ford dealers use their Motorcraft semi-syn in "The Works" package for a fair price, and I did that. 18 months later, 5500 miles later, I took it to them again again and tipped the tech to draw a sample for Blackstone. TBN was fine, and there were no contaminants or breakdown of any significance. This was my first engine oil analysis, but I'm in the hydraulics industry, and recognize the importance of regular analysis, particularly for particulates, not looked at with used engine oil.
Ford recommends 5W20 and I have no consumption at just over 100,000 miles. If I start getting consumption, I'll switch to their 5W30. I'm nearly 70 and don't crawl under cars any more; if I still did my own oil changes, I'd have no problem with any of the current SN(+) products; Ford, like any major, isn't going to label and market poor oil, though.
My PERSONAL rule has been 6000 miles, 12 months on vehicles without an OLM, but I am not unsatisfied with this change. We keep our cars in an attached garage which protects from most cold, moisture, and heat. It's probably only 2 or 3 times a year it is started soaked to under 55F.
IMO, your schedule is/was fine.