My bathroom is pretty small and until we replace our siding we don’t have a good way to vent an exhaust so I got a 13 pint desiccant dehumidifier and it works really well! There are even smaller ones if you search that seem to get good reviews for small bathrooms.
This is the one I got:
Ivation 13-Pint Small-Area... https://www.amazon.com/dp/B07B8SCPZ4?ref=ppx_pop_mob_ap_share
Your best bet is probably a desiccant wheel dehumidifier like https://www.amazon.com/Ivation-13-Pint-Small-Area-Desiccant-Dehumidifier/dp/B07B8SCPZ4/
The Peltier/TEC ones are small, cheap, quiet, inexpensive, and completely inadequate for keeping up with an active moisture source like humans.
The desiccant buckets are similar - good for sealed spaces, but you'll replace them way too often with people inside.
The compressor ones work well, but they're all loud and bulky.
https://www.amazon.com/dp/B07B8SCPZ4?ref=ppx_pop_mob_ap_share
Just got this for my 4x4 tent. I have negative pressure in the tent. Went from 70% rh to 50%.
I have it set to hold @ 50% and the unit is on low.
Puts out a impressive amount of heat for such a small unit.
Recommend one of these. Small, super quiet and very energy efficient but removes humidity like crazy. It’ll fill a five gallon bucket in my basement in just a few days.
Ivation 13-Pint Small-Area Desiccant Dehumidifier Compact and Quiet - With Continuous Drain Hose
https://www.amazon.com/dp/B07B8SCPZ4/ref=cm_sw_r_cp_api_i_rbWtFbATYZDSE
Try a dessicant dehumidifier. I’ve had really good performance out of this one.
https://www.amazon.com/Ivation-13-Pint-Small-Area-Desiccant-Dehumidifier/dp/B07B8SCPZ4
They can be hard to find but a new generation of ‘desiccant’ dehumidifiers makes this easy: