Ignore your experience, put it out of your mind, look for a position elsewhere, preferably in adult education. I lasted three days in my first job (high school) in Bkk, threw in the towel even though the principal begged me to stay. Tried primary school level, which was even worse. It's all politics in Thai schools, utterly and totally disgusting conduct towards foreigners, jealousy and covering up their incompetence. It is all about show, appearance, fun and frolic, entertainment, games - like eternal play school. It is not about teaching and serious learning - and the general educational outcome level proves that, not only in regard to English language acquisition where Thailand ranks last in ASEAN.
After a bit of experience you should try private students, online or in person. Companies also pay well, you are teaching adults, who are occasionally more motivated because English language might be an obligatory qualification for career advancement.
Thailand doesn't deserve foreign teacher input, effort and commitment. Pity the kids, though, they are missing out big time, with a bad education system and very questionable tertiary qualifications.