Joselyn,
I think I understand the urgency of the treatment and the reasons you can't look for a different dentist at this point. It is ok to get a treatment in a chain once if you have no other choices. What Dr. Daniel's video points out is that a chain very often might not be the very best choice if you are looking for a dentist for life. So once the tooth is out and you have a bit more time and energy to find that trusted dental care professional you want to accompany you for the future, then looking for a small practice might be the best idea, but that is not a topic for now.
There are still plenty of things you can do to make sure the treatment will be as stress free as possible. I get your wish to just get over it and your readiness to toughen it out anyhow, however I think taking care of yourself should still be a priority. Again, a profound anesthesia is the basis of any treatment and it has nothing to do with whether it's a chain and not even whether the dentist is kind or not. They might not be treating you too kindly but still giving you enough anesthetic is a pre-requisit of anything. I can only encourage you to keep a clear communication with the dentist and let him know if you feel you are not numb enough. May I ask you whethter it's an upper or a lower tooth?
Some suggestions that could help you to get through the visit in a acceptable way:
1. If you can, take a family member or a friend with you. Should you feel too scared to let them know you feel uncomfortable, this person can act as your advocate and make sure you will be treated well.
2. Ask your dentist which kind of stop sign he prefers with his patients and test it out at some point.
3. Numbin shouldn't be a problem, even if the tooth feels weird (the most teeth that need to come out feel weird and can still get numbed normally). If you feel any, even a slightest pain, let your dentist know and ask for more anesthetic. Usually there is the possibility to add some anesthetic or use a different way of numbing, so please if anything is not ok, keep on complaining and asking for more local.
4. Do not let anyone talk you into iv sedation. As I mentioned IV sedation has no connection to people who can't get numbed. You still need local anesthetic even under iv so I do not get the point why a dentist would suggest IV just out of worry that the local might not work. It makes no sense. If you struggle to cope, move around, need a break every two minutes or otherwise do not allow the dentist to work or if you wish not to remember anything from the treatment then iv sedation might be an option but dentist saying 'the tooth might be difficult to get numbed, let's do iv sedation' doesn't make sense.
Negative dental experiences might worsen your dental anxiety and prevent you from going in the future so I can only encourage you to take care of yourself as much as you can in this situation. I have seen some removals of infected teeth without antibiotics and also with antibiotics and there was no problem with numbing, some of them just needed more local or a different way of numbing.
Last but not least, it's ok to feel tired of looking for dentists and feeling like there is no hope especially if you tried so hard. After the tooth is out, allow yourself to get some rest and process it all and once you are ready, look around a bit more. I am a firm believer that there is the right dentist for everyone, they are just sometimes a bit harder to find. I looked into our recommendations section, we have few recommendation from Texas there so maybe that will help. Again, nothing for today or tomorrow, but wanted to let you know.
All the best wishes and keep us posted