The 52-year-old manager saw his side booed during their 0-0 draw away to Brentford on Thursday (01.01.26) and while he insisted he hasn't been reading criticism of the team, he knows things need to change.
Asked where supporters need to be more understanding, Frank told Sky Sports: "That question is very difficult for me to answer. We are going off a few boos after the game and I'm not reading anything on social media or articles.
"I watch the team and I'm very aware that we are not where I want us to be."
And Frank insisted there were still positives to take from the game.
He said: "The positive is that against a very good home team that you need to respect with the results they've had where they're beating Liverpool, Man United, Newcastle, Villa, drawing with Chelsea, and keeping them to that low amount of chances, chances and seven shots in total.
"That's a very, very strong defensive performance. I think the back four did excellently, the whole team did excellently.
"The amount of unforced errors is the biggest negative, and that's the bit that then takes out eight, nine, half transitions where you're not getting into good positions. And then when we were up there, we lacked the cutting edge on the day."