That's just not fair. Expectations have changed, technology has changed and team sizes have grown to accomodate the desires of the audience. With this extra scope comes extra risk which has been poorly managed.
> but most main stream titles were quite polished.
This is your nostalgia talking, and there's a huge amount of survivorship bias at play here. There were plenty of games from the 80s and 90s period that were anything from crap to just straight up unplayable, and they were just left in that state.