Can't see landscape, very cloudy

Problem started 3 weeks ago.
Can't see the landscape, although actions can be performed they are not visible.
I have deleted all profiles including the .minecraft folder in the Users directory and re-installed with no luck.

I have noticed this repeated in the logs,
[09:10:35] [Client thread/INFO]: Warning: Clientside chunk ticking took 113 ms
[09:10:36] [Client thread/INFO]: Warning: Clientside chunk ticking took 130 ms
[09:10:36] [Client thread/INFO]: Warning: Clientside chunk ticking took 149 ms
[09:10:38] [Client thread/INFO]: Warning: Clientside chunk ticking took 518 ms
[09:10:39] [Client thread/INFO]: Warning: Clientside chunk ticking took 220 ms
[09:10:39] [Client thread/INFO]: Warning: Clientside chunk ticking took 222 ms
[09:10:40] [Client thread/INFO]: Warning: Clientside chunk ticking took 123 ms
[09:10:40] [Client thread/INFO]: Warning: Clientside chunk ticking took 147 ms
[09:10:40] [Client thread/INFO]: Warning: Clientside chunk ticking took 142 ms
[09:10:41] [Client thread/INFO]: Warning: Clientside chunk ticking took 191 ms
[09:10:45] [Client thread/INFO]: Warning: Clientside chunk ticking took 176 ms
[09:10:47] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 3443ms behind, skipping 68 tick(s)