I ate my second (and last) Big Mac in 1978. And even then I threw half of it away. I've occasionally eaten their chips (fries) as a fall back when travelling (and utilised their conveniences, the best thing about McDs) but as for anything else, yecchh! I foolishly allowed myself to get talked, a few years ago, into trying some Macca's breakfast. The egg and bacon McMuffin was the single worst thing I had ever tasted. Until I tried a hash brown - which was even worse! Each to their own, and good luck with it, but I simply cannot stomach the stuff.
And to call them 'restaurants' is beyond the pale!