He often came in for heavy criticism due to his unconventional methods.

came 是动词 come 的过去式，表示"来、到达"的动作。 in 是介词，表示"进入某种状态或情况"。 for 是介词，表示"因为、由于"的原因关系。 come in for 是一个固定短语，意思是"招致、受到（批评、指责等）"，表示被动地承受某种负面评价或后果。