Maybe I'm just having some bad luck but my experience with the taxis here hasn't been great.
Came from Bkk via the airport rail link to Phaya Thai station.
Needed to go to Tara Place which according to the reviews should be between 75-95 Baht.
Took about 6 or 7 taxis who quoted between 150-250 before finding one that would use the meter. Cost was 117 Baht and I still tipped. This was around 3PM.
Coming back tonight around 6PM from Siam was the same issue.
Used Grab but 4 drivers refused to pick us up because of the traffic.
Tried flagging down a few taxis and was quoted 250-300 Baht.
Finally after 40 minutes a Grab driver picked us up. Cost was 158 and I gave him 180.
I'm sure most taxi drivers here are decent but the ones I've encountered so far want to scam you. :(