Gerrymandering is a bigger issue than term limits IMO. I'll caveat this the same way as always - this is not an indictment of just one party. The Dems in Maryland are every bit as bad as the GOP in North Carolina. That sort of stuff creates guaranteed wins for house seats in some districts for some parties. The problem is that the challenge for that seat will not legitimately come in the general election. It will come in the primary. So Congressman Senator of safely Dem district X decides to vote in favor of something that is proposed by Congressman Doe (R). Now, someone left of Congressman Senator is going to run against him in the primary citing that vote as proof that he's not really a Dem. The same stuff is happening on the other side of the aisle. Now we keep pushing our representatives further from the middle, and we end up with no common ground, and no reason to seek common ground because it is potentially damaging to your political career.
While I'm soapboxing, I'd like to point out that the claims that AOC is representative (no pun intended) of the Dems that took over the House, it's not factually correct. The folks who swung that were moderate dems who took over republican seats. Those folks don't get the attention they should, but moderate talking points rarely get any airplay - no good for ratings.