Will past overstays affect my DTV visa application?

Doubt it, main thing is the wonga 500k THB or equivalent currency 👌

Most people on Dtv's have similar history.

No

One guy posted in here he had a 1 year ban for overstay and still got DTV. 1 year ban means a 90 day overstay. Yours will not be a blocking point

I doubt it.

yes

I had two day overstay before going to Laos to apply for DTV. My ED visa was not cancelled and I was not allowed to leave Thailand until I cancelled it.

Prior to that I had one day overstay six years ago as my Thai partner could not cross the border due to the counter being closed.

Consulate didn’t even mention it. I did query it with them at the end of the interview and the interviewer explained it was not a concern for the consulate, only relevant to immigration.

Edit:

I did write an additional letter after the covering letter to explain the two day overstay. So they were already aware of it as part of the DTV application. All documents were approved within two days.

Depends in how many years. But short times so yeah i would say up to the person looking at application

Maybe

Up to the person ticking the boxes