We own two Nissans, a 2011 Infiniti M37, and a 2018 Nissan Pathfinder. The M37 has been 100% completely reliable and durable, with only regular maintenance items (oil, coolant, brakes, etc), and just recently had trans and diff fluids replaced at 100K miles. Still runs smooth like butter and hasn't given me any issues whatsoever.
Our Pathfinder is our pinhauler and is super comfortable and runs nicely. It has towing capacity of 6K pounds, so if we needed to haul something, it's got us covered. I highly recommend the brand.
The Frontier, from what I've read, is outdated and has essentially been the same for the last 10-15 years. The same look, interior; 2020 gets a new engine and drivetrain, but in the same package.
If you want to take a step up, you might be able to find a tad bit older Titan for the same price as a newer Frontier, with better amenities, but it's a full-sized pickup.