On the dline he tried to do the minimum? He signed four free agents (the two JAG guys for mid contracts, Calais and dalvin) and spent two first round picks at the position.
Yes. If you follow the timeline, he tried to do the minimum.
2023.
He lost/let go JJ Watt and Zach Allen.
He added LJ Collier, Kevin Strong, Carlos Watkins, and Dante Stills.
Those additions competed with Jonathan Ledbetter, Leki Fotu, and Roy Lopez.
Obviously, that was a horrible unit.
2024
To solve a horrible DL unit Monti does the following.
Mid FA contracts to Justin Jones and Bilal Nichols. Neither who were considered anything more than average NFL players.
Draft Darius Robinson in round 1 who was most productive in college at EDGE.
These compete vs Stills, Tonga, Naquan Jones, and Lopez.
Predictably, when healthy these two mid FA players make very little impact and Robinson is moved off the EDGE and into a new position.
Another predictably bad group.
2025
Heading into his 3rd year as GM, Monti decides to actually invest in the DL.
He adds FA vets Dalvin Tomlinson and Calais Campbell who instantly become the two best players on the line, and drafts Walter Nolen who unexpectedly gets injured.
So, in summary, heading into year 3, Monti finally decided to invest real assets into the DL (multiple) to try and fulfill his goal of building the lines two offseasons prior. A prime example of too little, too late.