The "very elliptic orbit" does really matter here. With your orbit parameters, your planet would spend a lot of time in a zone where insolation is smaller than required to keep the planet's average temperature above zero Celsius. So even if it's fully covered with water, it would just freeze over. Yet, when it'll be polar summer in the south, when the sun is constantly above the south pole and the planet is at 0.7AU from it, the insolation would produce a lot of water vapor, melting oceans at the south-polar area and causing major harsh winds over the equator into the polar night of the northern hemisphere. I'm not sure whether the depths of the ocean would remain frozen, after all the south pole won't receive any light for the majority of time so the ocean there is almost certain to freeze down to the bottom over the long sunless southern winter, and there won't be much energy transfer from the northern hemisphere in this period as the insolation would barely heat the north pole to about -20 Celsius. Since there will be major temperature difference between winter and summer, I doubt that there would be highly organized life (aka plants) in the far southern lands, rather something short-lived and able to hibernate would live in there, like moss. Thus a very harsh polar climate zone would be in the far south.
The interesting things should happen at the 0-45S latitudes, as there will be "winter" with high strong sun but low daytime and another winter with low weak sun when the planet is distant, but two "summers" with the sun in zenith while insolation is above average. I'd call this climate zone "subpolar" as it will be fully covered with snow in winter, but a rapid spring lasting some hundred days would allow liquid water on the surface, enough insolation would let plants bloom, the excess humidity from the far south would cause heavy rains allowing fertility of the soil, yet past the second summer everything should cover up as the long incoming winter would freeze things up.
The 0-45N latitudes would look grim, because the local summer would not bring in enough sunlight to make things warm, heavy snow coming in while the planet is heated the most would cover whatever would get thawed, if any, and the hottest period there would be spring, still I doubt there would be enough heat to uncover the ground. So, frozen over.
The 45-90N or far north would be even more grim, because the only time the lands there would see the sunlight is when the planet is too far from the sun to ever heat it above zero, and the polar day in the far north would be as freezing as one on Mars, and since the planet's albedo would be very high due to complete snow coverage, even those little bits of energy would be reflected into space. Again, frozen over and look like Antarctic on steroids. Not too cold to liquify the atmosphere, but pretty close, at least CO2 will start snowing at a constant rate.
What should you try with this planet to fix climate
First, lower eccentricity (and amplify the sun's power if you desire a really long year - the sun's mass determines not just its power but also the year's length) so that the insolation difference won't be as dramatic (a factor of 8 is waaay too much). Perhaps down to 0.1 or 0.15, so the difference would be about 2 times, that would make winters more bearable in either part of the planet. Next, if your orbital parameters would still make it too cold - add CO2 and amp ground level pressure, it doesn't look like atmospheric pressure has a strong dependence on planet's gravity, so your atmospheric pressure could be a lot higher than on Earth. This will introduce a greenhouse effect, with enough potential to allow better than subpolar weather (at least temperate) in at least one band on the planet, and allow plant proliferation to greater extent, together with soil fertility, microbiome activity and overall temperature under the snow during winter. This could in turn allow sentient life to appear, settling underground to be kept warm in cold seasons and eventually evolve. Allow travelling over the ocean while it's frozen over, if there would be global freezing, again check average temperature. Add a moon for tidal heating of the ocean depths, although constant tides would probably wash over your puny islands destroying life on them... Consider it anyway. Add tectonic activity, as any revolving planet with so much flat surface would have VERY high winds, I can't check if the winds would just be too strong to handle, limiting plant life to surface clinging forms and whatever animal life to crawling. Maybe there's more, but currently your planet is too harsh, although some positive temperatures do touch its surface allowing some life to be present.