If you want to listen to Michael and Mario give Marshall Pruitt the information that's in that article, here is an audio recording of it :
https://marshallpruett.podbean.com/e/mp-419-michael-andretti-on-his-troubled-1993-formula-1-season/
You really need to read the chapter in that book I referenced above, as it is the only thing in print that gives an accounting of just how bad the car was. When I mean by that is Michael's early season laps were few, because the car literally would fail so often. There are times he would go to the grid not knowing whether they would even be able to get the car to function. Even later in the season, he had a semi automatic transmission that would shift erratically, a suspension that would change ride height at random times... even Senna had some of these problems, though not nearly as many as Michael, and it put Senna's car off the road too.
Some say, well what about Sennas wins? Do yourself a favor and go back and look at how many of those were on a dry track. You'll find that Senna won in the rain, sometimes because he was so good in wet conditions and sometimes because all the other top drivers had issues. I recall one race where Alain Prost had to pit seven times. And don't think they had equal equipment, Senna usually had a later specification engine than Michael did.
Then there is the issue of what some people would call sabotage. There were a couple guys in the team that did not want Michael to succeed and many people think that they deliberately slowed him down. Those that did not follow the formula one circus as deeply as I did in those days might think that sort of sentiment to be something along the lines of a tinfoil hat conspiracy. I sure you, as impossible as that seems, F1 can be that underhanded at times. Want proof? Go back and look at the lap times in the tests that took place after some of the races were run. You will notice a pattern.
As for his lack of living there, that's 100% bull**** that the European press put forth. They were not fans of his and they ran him into the ground. They also didn't like his wife, and had lots to say about her. Michael did consider living in Europe that year and nearly completed the purchase of a house in France, but how often had you heard that story? My bet is that you've never heard it.
You really do need to read the book, if you have any interest in this episode, as it will tell you and no one certain terms just how many problems the team had that kept Michael from turning laps in the car. For the life of me, I have never understood why Michael has remained silent to this day on those details.