DMC4, (gfwl) RE5 - pre-outsource era, were good. RE5 steam had a lot of issues, ended up requiring gfwl installation lol. RE6 - multiple issues including game breaking bugs, took months to fix. Revelations - I have micro stuttering (can smoothly run RE6 supersampled), a million popping up info dialogs requiring Ok - unbearable. DmC runs ok, the only good thing about it (didn't like mkb controls one bit). Rev2, DD - don't know.
Even if SCE handled the port responsibility is on Capcom. AE PC had terrible issues including networking which weren't fixed for months, then Ultra was out and had same problems. Add several months to that and the game became somewhat playable - by that time nobody cared.