You’ve just started on flats?
Its probably worth working on your technique and getting used to them before throwing money at the problem.
Although you’ll probably be able to sell the 50:50s for a decent price and buy something that won’t fall apart instead.
Avoid V8s if you have big feet.
I like shimano dx. The above Funns are excellent. Some wellgos are good and cheap. Tioga surefoot mx are good too. Edinburgh bikes do their own cheaper version of Gusset slim jims which are good too. Easton Cullys and (even larger) flatboys are also good but pricey. Atomlab trailkings are nice as well.