You do need court order. Court order needs to specify which days and times her dad has visitations. Occasional unscheduled visit is fine but it can’t be consistently crazy like this.

You do need a lawyer to discuss that the father is possibly using drugs when taking a child for a visit. Drinkers and drug users still have rights to see their children but only when they are sober (drug tests are required), and supervised visits only. If you suspect he’s using drugs (doesn’t matter if it’s weed and it’s legal , it’s a drug) lawyer needs to get involved.

Could you qualify for legal aide or find someone pro bono? Without lawyer and judge you can’t do much here