Daliz: I'm not a Mint user but I'm pretty sure that if you're installing the usual libSDL2 package, you should not be getting wayland-anything. Is it possible that you chose the wrong package to install? Or there are some really messed up dependencies somewhere.
Also, a good practice when installing packages is to check which ones are affected. Especially if there are packages that are going to be removed, don't do it just like that.
Yeah usually I would install via synaptic package manage, so get to see the list of affected packages, rather than the terminal, but as I had previously installed SDL2 I foolishly didnt think anything of it.
I went to install the libSDL2-2.0:i386 package, which thankyou I have just noticed was wrong! I should have installed libSDL2-2.0-0:i386 tat '-0' makes all the difference doesn't have wayland as a dependacy.
Well this will teach me to pay more attention, lesson learned I think!