Can mobile suits really exist in today's warfare?

We have watched a lot of mobile suits being used in anime like Gundam and Code Geass, but if they were to be exist in our world, can they really exist as they appeared to be in the anime?

First of all, it is unlikely to create Gundam mobile suits in the real world. This is because the scientist today are still novice in creating machines that can walk and run like a human. The mobile suits in Code Geass is more likely to be created instead, because they used wheels to move instead of their legs. Other than that, can we really create a unit that can remain stationary above the ground? In our world, the only thing that can remain stationary in the air is helicopter, not to mention they a lot of fuel to achieve that.

Secondly, let's talk about the practical usage of mobile suits. Mobile suits are large in size, so that make them an easy target, so it's armor must be thick enough so that it can at least withstand bullets. Moreover, it must be agile enough to evade cannons and missiles. Furthermore, it must have 360 degrees 3-dimensional surveilance camera so that the pilot knows the environment better. And the weapons, our world today have not manage to develop particle weapons yet, so the mobile suit in our real world still have to use guns and cannons to kill the enemy. And if we were to able to develop particle weapons, the particle weapons won't look the same as in the anime's one, because particles with rest mass are small, to contain a massive amount of energy, it must move at a high speed as derived in kinetic energy formula, E=0.5mv^2 As for particles without rest mass, they move in the speed of light. So the particle weapon probably unavoidable by humans, not like what we saw in the anime, the pilots actually evade many particle beam.

In conclusion, mobile suits is impractical to be used in today's warfare. To be honest, I have nothing personal against the animes' author. In fact, I like the animes, just that I always try to figure out whether it could be happen in our real lifes and most of the time it cannot happen.