Just to clarify, the pictured hard suit has nothing to do with SpaceX and is instead an AX-5 experimental prototype from 1988. You can even see “AX-5” in the top-right of the image, as it was being tested at the Ames Space Center.
The real Tesla suits look like leftovers from a bad sci-fi film, imo, but with all of the SpaceX and NASA publicity campaigns it’s not hard to find photos like the one posted by Joshk. Google it.
Any suit that looks huge and cumbersome is an EVA suit, not a flight suit. The suits worn by Bob and Doug are rated for a vacuum for a short duration in some unforeseen emergency, but they could not be used for work outside the vehicle as they would literally fill up like a balloon and the astronauts couldn’t move their limbs even before they froze to death.
EVA suits are a fairly difficult problem as you need to pressurize and insulate the suit and make it highly robust while still allowing the astronaut to move around with ease for EVA’s that might last for many hours. Rigid shells can solve the strength and durability problem when combined with an air-tight inner liner, but tend to restrict movement. Joints are points of both failure for the inner layers and binding for the hard shell, however, so sliding joints as displayed on the AX-5 have been avoided in production U.S. suits to date.
With all of that said, not a single astronaut who spent the money and time to get 4 PhDs and 6 Master’s degrees and finally got a ticket to space and an EVA slot will care one iota whether their EVA suit looks silly or not; only the PR department and CR (Congressional Relations) folks at NASA will care.
The EVA suits actually used on the ISS are called Extravehicular Mobility Units (EMU’s) and are nearly 40 years old with some staying aboard the ISS for 6 years at a time because it’s so expensive to transport them back and forth. They have been upgraded over the years, but the existing suits were first used on the Space Shuttle. 2 EMUs were lost with Columbia, leaving NASA with 11 working suits last I heard. The ones used for training in the underwater neutral buoyancy tank are not full EMUs, but mock-ups not suitable for space.
So, when you see astronauts outside the ISS replacing batteries or repairing leaks, they are wearing the same suits first worn by astronauts in the 1980’s. Luckily, they’ve been cleaned every 6 years 
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NASA got laughed at pretty badly when they first tried to have an all-female EVA crew for the first time in history only to realize that the EMUs aboard the ISS were too large for one of the astronauts. People saw this as obvious evidence of the sexism at NASA and while they indeed should have had the proper suits for the planned crew, it’s hard to swap sizes when you keep EMUs aboard the station for 6-year stints. The historic EVA waited for a couple of months until they could send up a smaller EMU on a cargo capsule.
