Defending champions Ireland are next up, followed by Scotland at Murrayfield before a Cardiff finale against England on March 15.
If Wales win any of those games it will rank as a major surprise, with Warren Gatland’s tenure as head coach looking more precarious than ever.
Gatland has overseen just six victories in 26 Tests since returning for a second stint in charge.
“You can’t hide from the outcomes of what is going on,” said Tompkins.
“When we say the preparation is going well, we’re working really hard in training. I promise you it’s not going undone.
“We have to keep going and keep trying, and hopefully something comes our way.
“I get there is frustration, but it’s not as easy as saying it’s one thing or the other. It’s everyone together.
“All I can do as a player is keep trying and be better. That’s what we can do. It’s not as easy as saying this needs to change or that.”
