Whenever I accelerate from stop, my car hesitates to pull for first 3 seconds (feels like transmission problem or less petrol in cylinder )

1) Changed the spark plugs as initial blind decision. 1st thing all mechanics check. My car ran 100k and never changed spark plugs until now. The issue remains the same.

2) Removed Air flow sensor and cleaned it well. I just used my mouth to blow off the dust. Goal .... Issue is resolved.

My understanding is due to dust in sensor, the signal from sensor to engine was wrong (My wild guess)

I bought a 2015 Honda Accord LX new and at 200 miles a major part in transmission broke. When I brought it to the dealership's maintenance shop, they hardly believed me since I had bought the car 5 days before. They fixed the part and it would have cost $750 but of course the warranty covered it (it was some type of plastic ring in the engine).

Fast forward a year and then another, the same issue of a near non-existent response time when pressing the gas pedal happens. Now, in week 1, the car wouldn't even move! That's when the transmission was fixed. But now, the delay is seconds and usually happens in the first 3 minutes of starting the car, then it is normal. And the problem is exacerbated in extreme weather (over 95 degrees and under 30 degrees). Of course living in Dallas in August, it's always over 95 degrees. A new car under 30,000 should not have a situation where you press the gas and the response time is delayed.

Yes, I can warm the car up 3 minutes every time I drive, but should a new car under 30,000 miles do this? I have driven 2 other older model Honda Accords (1997, 2011) and this hasn't happened. I'm worried I will need a total transmission replacement in a year or two. I know the CRV engine can behave like I describe, but this problem is magnified with my 2015 Honda Accord.

Very disappointed and given what I've been reading about post 2000 Honda Accords, this is a trend. I'm scared this problem will happen at a time when I really need to accelerate to merge into traffic. I don't feel safe driving it and that is a #1 need when driving a 2,000 pound ball of steel around other huge and heavy balls of steel and metal. I'll be looking for a different make of car in the future and I hate break-ups!