Chasing a new proxy before you know what's broken usually wastes money, since the fix differs by layer. Load Reddit logged out, then try spinning up a brand new account on that same connection. If the fresh one dies within minutes, your IP or network is the problem; if only your old account is gone, it's account-level, and no new IP revives a dead account. That part just means starting over.
For an IP problem, you want a clean address Reddit already trusts, so residential or mobile rather than a datacenter range or a shared public VPN, since those pools tend to be flagged already. A sticky residential proxy or a genuinely separate network does the job. For a fingerprint problem, isolate it behind a fresh browser or antidetect profile with cookies and cache cleared, ideally on a different device. A clean IP behind a dirty fingerprint still gets picked off, and vice versa, so pair both from the first login, keep that pairing consistent, and rebuild slowly like a normal user.
Best,
Floqal