No one thinks questioning the war is TDS, but questioning enforcing laws concerning illegal immigration, or complaining when something good happens. There are those who without fail, every day, complain about something and blame Trump. That is TDS. I had issues with Joe Biden's presidency, but I didn't complain every day about everything and anything.
TDS is not a real thing nor is it a syndrome, just ridiculous. People have a very strong aversion to his style and leadership and that is all.
To label people with TDS using this "syndrome" language is to have a disparaging view of people who in fact do have mental health challenges which impair their ability to function fully in everyday life.
I suspect people who complain about DT a lot, are trying to snap MAGA people out of their state of denial.