Buying a condo without an agent, but seller’s agent seem to ignore me — advice needed

Recently I reached out to one agent and arrange to view a unit in a condo. I knew that this condo had many problems with quality, hence during the viewing I asked a few questions to verify what I’ve heard, to which the seller’s agent appeared to try to dodge.

After the viewing, I tried to arrange for another viewing; we want to determine if the quality issues affect this house — since the unit has plus points for us, if these are not real issues, we may even make an offer.

But the seller’s agent keeps delaying in arranging my viewing, and usually ignore my message until I nudge her.

I know that seller’s agents usually prefer to sell to someone without a buyer’s agent since they would get to keep the entire commission. I made it clear that I’m on my own.

Could the agent thinks that I’m a tire kicker kind of buyer who is just wasting her time? I have an IPA and prepared to make an offer for the right house.

Or could she think that it’s too troublesome to deal with me since I know too much? It might be easier to work with a less-informed buyer?

[Update] Or could it be that there are some more serious defects in the unit, as some Redditors pointed out below?

I’m trying to give her the benefit of doubt, but if she’s not a very forthright person, then I don’t know if I should move forward even if I like the unit?

If she keeps avoiding arranging the next viewing for me, what are my options? What would you do?