This quote is too negative (e.g. "I do not have problems with?") and too passive ("I participated in a lot of group assignments"). As a whole, it does not sound convincing.
Partly this has to do with the argumentation: participating in group work does not imply being good at it.
A possible positive version of this extract might be:
During my education I have always been an enthusiastic and active participant of team work. By being actively involved in numerous group assignments, I have noticed it suits me well.