In that case, before you do anything else. Set flow rate to whatever is default (100% I assume), and calibrate your esteps. It takes like 10 mins. Just get some measuring device (calipers best, ruler works good enough) and one of those estep calculators
So far all my printers are elegoo, they all work out of the box very well. They're support is pretty great as well, they've sent me replacement parts for things I admitted to breaking due to own stupidity (a new motherboard after I short circuited one, and a couple of led panels after a resin spill).
I can't speak of other companies, but elegoo seems alright
In that case, before you do anything else. Set flow rate to whatever is default (100% I assume), and calibrate your esteps. It takes like 10 mins. Just get some measuring device (calipers best, ruler works good enough) and one of those estep calculators